./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i --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_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/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_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/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_a31a3739-955d-4154-8fe9-df03f412e8b7/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 dda1041cfa36c4017116912acad0e6776c355afeb5733cf0531e7478051aaa6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:15:07,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:15:07,624 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:15:07,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:15:07,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:15:07,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:15:07,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:15:07,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:15:07,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:15:07,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:15:07,681 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:15:07,681 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:15:07,681 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:15:07,682 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:15:07,682 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:15:07,682 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:15:07,683 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:15:07,683 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:15:07,683 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:15:07,684 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:15:07,684 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:15:07,689 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:15:07,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:15:07,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:15:07,692 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:15:07,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:15:07,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:15:07,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:15:07,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:15:07,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:15:07,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:15:07,697 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:15:07,698 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:15:07,698 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:15:07,698 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:15:07,698 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:15:07,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:15:07,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:15:07,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:15:07,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:15:07,700 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:15:07,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:15:07,702 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:15:07,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:15:07,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:15:07,703 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:15:07,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:15:07,704 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_a31a3739-955d-4154-8fe9-df03f412e8b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda1041cfa36c4017116912acad0e6776c355afeb5733cf0531e7478051aaa6d [2024-11-09 01:15:07,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:15:08,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:15:08,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:15:08,057 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:15:08,059 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:15:08,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i Unable to find full path for "g++" [2024-11-09 01:15:10,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:15:10,564 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:15:10,565 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2024-11-09 01:15:10,573 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/data/803c36a76/9a6671e923d14e538612a8eccefec45e/FLAG26bfd5d80 [2024-11-09 01:15:10,953 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/data/803c36a76/9a6671e923d14e538612a8eccefec45e [2024-11-09 01:15:10,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:15:10,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:15:10,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:15:10,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:15:10,967 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:15:10,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:15:10" (1/1) ... [2024-11-09 01:15:10,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6231a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:10, skipping insertion in model container [2024-11-09 01:15:10,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:15:10" (1/1) ... [2024-11-09 01:15:10,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:15:11,232 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_a31a3739-955d-4154-8fe9-df03f412e8b7/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2024-11-09 01:15:11,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:15:11,263 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:15:11,277 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_a31a3739-955d-4154-8fe9-df03f412e8b7/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2024-11-09 01:15:11,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:15:11,310 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:15:11,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11 WrapperNode [2024-11-09 01:15:11,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:15:11,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:15:11,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:15:11,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:15:11,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,349 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-11-09 01:15:11,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:15:11,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:15:11,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:15:11,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:15:11,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:15:11,382 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:15:11,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:15:11,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:15:11,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (1/1) ... [2024-11-09 01:15:11,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:15:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:11,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:15:11,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:15:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:15:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:15:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:15:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 01:15:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:15:11,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:15:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:15:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:15:11,539 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:15:11,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:15:11,783 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-11-09 01:15:11,783 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:15:11,812 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:15:11,813 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:15:11,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:15:11 BoogieIcfgContainer [2024-11-09 01:15:11,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:15:11,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:15:11,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:15:11,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:15:11,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:15:10" (1/3) ... [2024-11-09 01:15:11,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a75a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:15:11, skipping insertion in model container [2024-11-09 01:15:11,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:15:11" (2/3) ... [2024-11-09 01:15:11,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a75a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:15:11, skipping insertion in model container [2024-11-09 01:15:11,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:15:11" (3/3) ... [2024-11-09 01:15:11,824 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2024-11-09 01:15:11,840 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:15:11,841 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:15:11,903 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:15:11,932 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;@500c7d73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:15:11,932 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:15:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:15:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:15:11,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:11,951 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] [2024-11-09 01:15:11,952 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:11,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1119753597, now seen corresponding path program 1 times [2024-11-09 01:15:11,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:11,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534571901] [2024-11-09 01:15:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:12,315 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 01:15:12,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534571901] [2024-11-09 01:15:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534571901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:15:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:15:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:15:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443370194] [2024-11-09 01:15:12,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:15:12,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:15:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:15:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:15:12,356 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 01:15:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:12,525 INFO L93 Difference]: Finished difference Result 79 states and 129 transitions. [2024-11-09 01:15:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:15:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) Word has length 21 [2024-11-09 01:15:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:12,555 INFO L225 Difference]: With dead ends: 79 [2024-11-09 01:15:12,555 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 01:15:12,562 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 01:15:12,570 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:12,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:15:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 01:15:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-09 01:15:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 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 01:15:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2024-11-09 01:15:12,672 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 21 [2024-11-09 01:15:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:12,677 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2024-11-09 01:15:12,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 01:15:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2024-11-09 01:15:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 01:15:12,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:12,680 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, 1, 1, 1, 1] [2024-11-09 01:15:12,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:15:12,680 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:12,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2049600293, now seen corresponding path program 1 times [2024-11-09 01:15:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:12,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18719685] [2024-11-09 01:15:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:15:12,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18719685] [2024-11-09 01:15:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18719685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024729250] [2024-11-09 01:15:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:12,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:15:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:13,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:15:13,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:15:13,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:15:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024729250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:13,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071603238] [2024-11-09 01:15:13,173 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 01:15:13,173 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:13,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:13,183 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:13,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:14,170 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:14,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '432#(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 01:15:14,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:14,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 01:15:14,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083058544] [2024-11-09 01:15:14,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:14,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:15:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:15:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:15:14,334 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 01:15:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:14,652 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2024-11-09 01:15:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:15:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 37 [2024-11-09 01:15:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:14,654 INFO L225 Difference]: With dead ends: 129 [2024-11-09 01:15:14,654 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 01:15:14,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 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 01:15:14,656 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:14,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:15:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 01:15:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 01:15:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 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 01:15:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-11-09 01:15:14,676 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 37 [2024-11-09 01:15:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:14,677 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-11-09 01:15:14,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 01:15:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-11-09 01:15:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 01:15:14,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:14,681 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2024-11-09 01:15:14,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:15:14,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:14,882 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:14,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1585237021, now seen corresponding path program 2 times [2024-11-09 01:15:14,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:14,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010762577] [2024-11-09 01:15:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 01:15:15,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010762577] [2024-11-09 01:15:15,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010762577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476806434] [2024-11-09 01:15:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:15:15,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:15,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:15,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:15:16,055 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 01:15:16,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:16,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:15:16,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 01:15:16,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 01:15:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476806434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493552460] [2024-11-09 01:15:16,181 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 01:15:16,181 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:16,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:16,182 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:16,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:16,669 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:16,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1269#(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 01:15:16,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:16,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-09 01:15:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758263132] [2024-11-09 01:15:16,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:16,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 01:15:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 01:15:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-09 01:15:16,827 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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 01:15:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:17,306 INFO L93 Difference]: Finished difference Result 260 states and 323 transitions. [2024-11-09 01:15:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:15:17,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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 85 [2024-11-09 01:15:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:17,308 INFO L225 Difference]: With dead ends: 260 [2024-11-09 01:15:17,308 INFO L226 Difference]: Without dead ends: 183 [2024-11-09 01:15:17,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-09 01:15:17,311 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:17,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 43 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:15:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-09 01:15:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-09 01:15:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0494505494505495) internal successors, (191), 182 states have internal predecessors, (191), 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 01:15:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 191 transitions. [2024-11-09 01:15:17,345 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 191 transitions. Word has length 85 [2024-11-09 01:15:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:17,346 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 191 transitions. [2024-11-09 01:15:17,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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 01:15:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 191 transitions. [2024-11-09 01:15:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-09 01:15:17,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:17,354 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 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, 1, 1] [2024-11-09 01:15:17,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:15:17,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:17,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:17,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1285702131, now seen corresponding path program 3 times [2024-11-09 01:15:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38869277] [2024-11-09 01:15:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-11-09 01:15:18,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38869277] [2024-11-09 01:15:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38869277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286539051] [2024-11-09 01:15:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:15:18,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:18,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:18,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:15:18,575 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:15:18,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:18,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 01:15:18,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-11-09 01:15:18,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-11-09 01:15:18,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286539051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:18,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405946226] [2024-11-09 01:15:18,920 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 01:15:18,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:18,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:18,921 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:18,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:19,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:19,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3038#(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 01:15:19,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:19,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 01:15:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479836845] [2024-11-09 01:15:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:19,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 01:15:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 01:15:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:15:19,483 INFO L87 Difference]: Start difference. First operand 183 states and 191 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 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 01:15:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:20,500 INFO L93 Difference]: Finished difference Result 536 states and 647 transitions. [2024-11-09 01:15:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:15:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 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 181 [2024-11-09 01:15:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:20,503 INFO L225 Difference]: With dead ends: 536 [2024-11-09 01:15:20,506 INFO L226 Difference]: Without dead ends: 375 [2024-11-09 01:15:20,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:15:20,508 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:20,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 36 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:15:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-09 01:15:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2024-11-09 01:15:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0240641711229947) internal successors, (383), 374 states have internal predecessors, (383), 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 01:15:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 383 transitions. [2024-11-09 01:15:20,555 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 383 transitions. Word has length 181 [2024-11-09 01:15:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:20,555 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 383 transitions. [2024-11-09 01:15:20,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 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 01:15:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 383 transitions. [2024-11-09 01:15:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2024-11-09 01:15:20,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:20,571 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 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, 1, 1] [2024-11-09 01:15:20,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:15:20,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:20,772 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:20,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -468688403, now seen corresponding path program 4 times [2024-11-09 01:15:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:20,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201300969] [2024-11-09 01:15:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2024-11-09 01:15:23,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201300969] [2024-11-09 01:15:23,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201300969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:23,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257509639] [2024-11-09 01:15:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:15:23,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:23,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:23,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:23,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:15:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:23,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 01:15:23,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2024-11-09 01:15:23,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2024-11-09 01:15:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257509639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421629146] [2024-11-09 01:15:24,563 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 01:15:24,563 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:24,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:24,564 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:24,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:24,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:25,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6685#(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 01:15:25,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:25,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-09 01:15:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305901638] [2024-11-09 01:15:25,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:25,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 01:15:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 01:15:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1878, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 01:15:25,161 INFO L87 Difference]: Start difference. First operand 375 states and 383 transitions. Second operand has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 48 states have internal predecessors, (128), 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 01:15:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:27,517 INFO L93 Difference]: Finished difference Result 1088 states and 1295 transitions. [2024-11-09 01:15:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 01:15:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 48 states have internal predecessors, (128), 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 373 [2024-11-09 01:15:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:27,522 INFO L225 Difference]: With dead ends: 1088 [2024-11-09 01:15:27,523 INFO L226 Difference]: Without dead ends: 759 [2024-11-09 01:15:27,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1141 GetRequests, 1087 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1202, Invalid=1878, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 01:15:27,526 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1346 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:27,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 43 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 01:15:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2024-11-09 01:15:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 759. [2024-11-09 01:15:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.0118733509234827) internal successors, (767), 758 states have internal predecessors, (767), 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 01:15:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 767 transitions. [2024-11-09 01:15:27,578 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 767 transitions. Word has length 373 [2024-11-09 01:15:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:27,579 INFO L471 AbstractCegarLoop]: Abstraction has 759 states and 767 transitions. [2024-11-09 01:15:27,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 48 states have internal predecessors, (128), 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 01:15:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 767 transitions. [2024-11-09 01:15:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2024-11-09 01:15:27,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:27,604 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 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, 1, 1] [2024-11-09 01:15:27,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:15:27,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:27,805 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:27,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1631103405, now seen corresponding path program 5 times [2024-11-09 01:15:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177878365] [2024-11-09 01:15:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16928 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 14812 trivial. 0 not checked. [2024-11-09 01:15:34,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:34,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177878365] [2024-11-09 01:15:34,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177878365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:34,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794568424] [2024-11-09 01:15:34,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:15:34,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:34,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:34,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:34,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a3739-955d-4154-8fe9-df03f412e8b7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process