./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 e7bb482b 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_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/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_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 0.2.3-dev-e7bb482 [2023-11-06 21:02:16,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:02:16,571 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:02:16,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:02:16,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:02:16,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:02:16,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:02:16,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:02:16,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:02:16,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:02:16,633 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:02:16,635 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:02:16,635 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:02:16,637 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:02:16,637 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:02:16,638 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:02:16,638 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:02:16,639 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:02:16,639 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:02:16,640 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:02:16,640 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:02:16,641 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:02:16,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:02:16,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:02:16,643 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:02:16,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:02:16,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:02:16,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:02:16,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:02:16,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:02:16,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:02:16,647 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:02:16,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:02:16,648 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:02:16,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:02:16,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:02:16,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:02:16,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:02:16,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:02:16,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:02:16,650 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:02:16,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:02:16,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:02:16,651 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:02:16,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:02:16,651 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_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda1041cfa36c4017116912acad0e6776c355afeb5733cf0531e7478051aaa6d [2023-11-06 21:02:16,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:02:17,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:02:17,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:02:17,025 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:02:17,025 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:02:17,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2023-11-06 21:02:20,282 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:02:20,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:02:20,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2023-11-06 21:02:20,517 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/data/adfa32a7e/aa5194854d1b4e49ae82c438da7d76f0/FLAG43bdb2f66 [2023-11-06 21:02:20,530 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/data/adfa32a7e/aa5194854d1b4e49ae82c438da7d76f0 [2023-11-06 21:02:20,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:02:20,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:02:20,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:02:20,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:02:20,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:02:20,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7c67e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20, skipping insertion in model container [2023-11-06 21:02:20,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:02:20,769 WARN L240 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_94f45cee-94bd-409d-ab27-9b0599911ab4/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2023-11-06 21:02:20,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:02:20,800 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:02:20,813 WARN L240 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_94f45cee-94bd-409d-ab27-9b0599911ab4/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2023-11-06 21:02:20,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:02:20,839 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:02:20,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20 WrapperNode [2023-11-06 21:02:20,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:02:20,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:02:20,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:02:20,841 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:02:20,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,880 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-11-06 21:02:20,881 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:02:20,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:02:20,882 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:02:20,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:02:20,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,905 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,906 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:02:20,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:02:20,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:02:20,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:02:20,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (1/1) ... [2023-11-06 21:02:20,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:02:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:20,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:02:20,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:02:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:02:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:02:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:02:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:02:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:02:20,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:02:20,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:02:20,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:02:21,071 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:02:21,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:02:21,249 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:02:21,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:02:21,308 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-06 21:02:21,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:02:21 BoogieIcfgContainer [2023-11-06 21:02:21,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:02:21,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:02:21,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:02:21,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:02:21,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:02:20" (1/3) ... [2023-11-06 21:02:21,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a220c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:02:21, skipping insertion in model container [2023-11-06 21:02:21,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:20" (2/3) ... [2023-11-06 21:02:21,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a220c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:02:21, skipping insertion in model container [2023-11-06 21:02:21,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:02:21" (3/3) ... [2023-11-06 21:02:21,327 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2023-11-06 21:02:21,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:02:21,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:02:21,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:02:21,412 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@12c24bac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:02:21,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:02:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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) [2023-11-06 21:02:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:02:21,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:21,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:21,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:21,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2091368047, now seen corresponding path program 1 times [2023-11-06 21:02:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:21,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428098527] [2023-11-06 21:02:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:02:21,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:21,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428098527] [2023-11-06 21:02:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428098527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:21,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:21,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:02:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037971985] [2023-11-06 21:02:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:02:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:02:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:02:21,748 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-06 21:02:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:21,860 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2023-11-06 21:02:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-11-06 21:02:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:21,873 INFO L225 Difference]: With dead ends: 36 [2023-11-06 21:02:21,873 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 21:02:21,878 INFO L412 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 [2023-11-06 21:02:21,884 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:21,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 21:02:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-06 21:02:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2023-11-06 21:02:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-06 21:02:21,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 12 [2023-11-06 21:02:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:21,930 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-06 21:02:21,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-06 21:02:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-06 21:02:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:02:21,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:21,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:21,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:02:21,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:21,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -485558467, now seen corresponding path program 1 times [2023-11-06 21:02:21,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:21,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304044815] [2023-11-06 21:02:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:02:22,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304044815] [2023-11-06 21:02:22,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304044815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:22,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066413781] [2023-11-06 21:02:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:22,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:22,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:22,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:22,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:02:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:22,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:02:22,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:02:22,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:02:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066413781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867749789] [2023-11-06 21:02:22,390 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 21:02:22,390 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:22,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:22,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:22,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:23,172 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:02:23,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '242#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 48)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-06 21:02:23,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:02:23,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:02:23,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:02:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444575878] [2023-11-06 21:02:23,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:02:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:02:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:02:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:02:23,283 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2023-11-06 21:02:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:23,432 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2023-11-06 21:02:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:02:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 20 [2023-11-06 21:02:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:23,434 INFO L225 Difference]: With dead ends: 65 [2023-11-06 21:02:23,434 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 21:02:23,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:02:23,436 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:23,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 21:02:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-06 21:02:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 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) [2023-11-06 21:02:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-11-06 21:02:23,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 20 [2023-11-06 21:02:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:23,448 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-11-06 21:02:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2023-11-06 21:02:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-11-06 21:02:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 21:02:23,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:23,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:23,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:23,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:23,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -807884655, now seen corresponding path program 2 times [2023-11-06 21:02:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510295403] [2023-11-06 21:02:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 21:02:23,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510295403] [2023-11-06 21:02:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510295403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765305339] [2023-11-06 21:02:23,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:02:23,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:23,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:23,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:23,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:02:24,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:02:24,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:02:24,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:02:24,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 21:02:24,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 21:02:24,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765305339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191492987] [2023-11-06 21:02:24,315 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 21:02:24,315 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:24,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:24,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:24,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:24,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:02:24,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '725#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 48)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-06 21:02:24,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:02:24,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:02:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-06 21:02:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965541517] [2023-11-06 21:02:24,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:02:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:02:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:02:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:02:24,856 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2023-11-06 21:02:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:25,156 INFO L93 Difference]: Finished difference Result 134 states and 197 transitions. [2023-11-06 21:02:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:02:25,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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 44 [2023-11-06 21:02:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:25,159 INFO L225 Difference]: With dead ends: 134 [2023-11-06 21:02:25,159 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 21:02:25,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:02:25,161 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:25,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:02:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 21:02:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-06 21:02:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 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) [2023-11-06 21:02:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-11-06 21:02:25,177 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 44 [2023-11-06 21:02:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-11-06 21:02:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2023-11-06 21:02:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-11-06 21:02:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 21:02:25,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:25,182 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:25,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 21:02:25,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:25,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1590144239, now seen corresponding path program 3 times [2023-11-06 21:02:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727217734] [2023-11-06 21:02:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-06 21:02:26,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:26,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727217734] [2023-11-06 21:02:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727217734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:26,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846704663] [2023-11-06 21:02:26,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:02:26,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:26,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:26,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:26,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:02:26,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:02:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:02:26,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:02:26,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-06 21:02:26,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-06 21:02:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846704663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102034448] [2023-11-06 21:02:26,693 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 21:02:26,693 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:26,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:26,694 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:26,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:27,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:02:27,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1742#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 48)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-06 21:02:27,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:02:27,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:02:27,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 21:02:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296362797] [2023-11-06 21:02:27,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:02:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:02:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:02:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:02:27,203 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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) [2023-11-06 21:02:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:27,855 INFO L93 Difference]: Finished difference Result 272 states and 383 transitions. [2023-11-06 21:02:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:02:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 92 [2023-11-06 21:02:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:27,862 INFO L225 Difference]: With dead ends: 272 [2023-11-06 21:02:27,862 INFO L226 Difference]: Without dead ends: 190 [2023-11-06 21:02:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:02:27,869 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:27,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:02:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-06 21:02:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-06 21:02:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0476190476190477) internal successors, (198), 189 states have internal predecessors, (198), 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) [2023-11-06 21:02:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2023-11-06 21:02:27,916 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 92 [2023-11-06 21:02:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:27,917 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2023-11-06 21:02:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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) [2023-11-06 21:02:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2023-11-06 21:02:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-06 21:02:27,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:27,931 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:27,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:28,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:28,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash -535541743, now seen corresponding path program 4 times [2023-11-06 21:02:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:28,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875007883] [2023-11-06 21:02:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-11-06 21:02:30,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875007883] [2023-11-06 21:02:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875007883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751129076] [2023-11-06 21:02:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:02:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:30,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:30,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:02:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:30,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:02:30,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-11-06 21:02:30,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-11-06 21:02:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751129076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163477875] [2023-11-06 21:02:31,767 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 21:02:31,767 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:31,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:31,768 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:31,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:32,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:02:32,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3827#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 48)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-06 21:02:32,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:02:32,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:02:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-06 21:02:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663272799] [2023-11-06 21:02:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:02:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 21:02:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 21:02:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 21:02:32,363 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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) [2023-11-06 21:02:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:34,004 INFO L93 Difference]: Finished difference Result 548 states and 755 transitions. [2023-11-06 21:02:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:02:34,005 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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 188 [2023-11-06 21:02:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:34,008 INFO L225 Difference]: With dead ends: 548 [2023-11-06 21:02:34,008 INFO L226 Difference]: Without dead ends: 382 [2023-11-06 21:02:34,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 21:02:34,017 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1324 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1324 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 21:02:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-06 21:02:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2023-11-06 21:02:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.0236220472440944) internal successors, (390), 381 states have internal predecessors, (390), 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) [2023-11-06 21:02:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 390 transitions. [2023-11-06 21:02:34,053 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 390 transitions. Word has length 188 [2023-11-06 21:02:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 390 transitions. [2023-11-06 21:02:34,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 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) [2023-11-06 21:02:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 390 transitions. [2023-11-06 21:02:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-11-06 21:02:34,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:34,069 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:34,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:02:34,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 884912657, now seen corresponding path program 5 times [2023-11-06 21:02:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500242890] [2023-11-06 21:02:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8648 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7567 trivial. 0 not checked. [2023-11-06 21:02:40,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:40,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500242890] [2023-11-06 21:02:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500242890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700347886] [2023-11-06 21:02:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:02:40,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:40,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:40,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:40,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94f45cee-94bd-409d-ab27-9b0599911ab4/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process