./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ --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 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:19:15,617 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:19:15,754 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:19:15,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:19:15,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:19:15,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:19:15,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:19:15,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:19:15,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:19:15,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:19:15,821 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:19:15,823 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:19:15,823 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:19:15,825 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:19:15,826 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:19:15,826 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:19:15,827 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:19:15,827 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:19:15,828 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:19:15,828 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:19:15,829 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:19:15,829 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:19:15,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:19:15,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:19:15,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:19:15,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:19:15,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:19:15,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:19:15,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:19:15,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:19:15,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:19:15,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:19:15,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:19:15,836 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:19:15,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:19:15,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:19:15,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:15,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:19:15,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:19:15,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:19:15,839 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:19:15,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:19:15,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:19:15,840 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:19:15,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:19:15,841 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_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a [2023-11-19 05:19:16,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:19:16,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:19:16,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:19:16,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:19:16,193 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:19:16,196 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2023-11-19 05:19:19,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:19:19,997 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:19:19,998 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2023-11-19 05:19:20,005 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/data/d7ceac3e4/857c3ae18d224996849085b580d55033/FLAGb45334fac [2023-11-19 05:19:20,021 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/data/d7ceac3e4/857c3ae18d224996849085b580d55033 [2023-11-19 05:19:20,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:19:20,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:19:20,027 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:20,027 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:19:20,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:19:20,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8e5c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20, skipping insertion in model container [2023-11-19 05:19:20,036 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:19:20,257 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_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2023-11-19 05:19:20,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:20,288 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:19:20,302 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_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2023-11-19 05:19:20,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:20,325 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:19:20,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20 WrapperNode [2023-11-19 05:19:20,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:20,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:20,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:19:20,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:19:20,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,368 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-11-19 05:19:20,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:20,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:19:20,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:19:20,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:19:20,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,398 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:19:20,402 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:19:20,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:19:20,402 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:19:20,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (1/1) ... [2023-11-19 05:19:20,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:20,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:19:20,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:19:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:19:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:19:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:19:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:19:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:19:20,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:19:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:19:20,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:19:20,570 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:19:20,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:19:20,765 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:19:20,829 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:19:20,829 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 05:19:20,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:20 BoogieIcfgContainer [2023-11-19 05:19:20,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:19:20,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:19:20,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:19:20,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:19:20,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:19:20" (1/3) ... [2023-11-19 05:19:20,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65281052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:20, skipping insertion in model container [2023-11-19 05:19:20,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:20" (2/3) ... [2023-11-19 05:19:20,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65281052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:20, skipping insertion in model container [2023-11-19 05:19:20,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:20" (3/3) ... [2023-11-19 05:19:20,856 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2023-11-19 05:19:20,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:19:20,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:19:20,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:19:20,953 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=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;@5fc3e6ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:19:20,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:19:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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) [2023-11-19 05:19:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:19:20,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:20,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:20,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:20,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1009842514, now seen corresponding path program 1 times [2023-11-19 05:19:20,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:20,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845719276] [2023-11-19 05:19:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:21,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:21,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845719276] [2023-11-19 05:19:21,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845719276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:21,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:21,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:19:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966204251] [2023-11-19 05:19:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:21,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:21,471 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-19 05:19:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:21,571 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2023-11-19 05:19:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-11-19 05:19:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:21,584 INFO L225 Difference]: With dead ends: 21 [2023-11-19 05:19:21,586 INFO L226 Difference]: Without dead ends: 12 [2023-11-19 05:19:21,589 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 [2023-11-19 05:19:21,595 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:21,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-19 05:19:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-19 05:19:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-19 05:19:21,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2023-11-19 05:19:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:21,641 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-19 05:19:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-19 05:19:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-19 05:19:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:19:21,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:21,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:19:21,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:21,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1465914726, now seen corresponding path program 1 times [2023-11-19 05:19:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:21,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286796795] [2023-11-19 05:19:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:21,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:19:21,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286796795] [2023-11-19 05:19:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286796795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420177576] [2023-11-19 05:19:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:21,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:21,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:21,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:19:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:21,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:19:21,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:19:21,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:19:21,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420177576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:21,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695263576] [2023-11-19 05:19:22,004 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:19:22,005 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:22,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:22,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:22,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:19:22,790 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:19:23,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |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_~incr~0#1| 2147483647))' at error location [2023-11-19 05:19:23,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:19:23,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:19:23,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 05:19:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586083760] [2023-11-19 05:19:23,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:19:23,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:19:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:19:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:19:23,036 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:23,091 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2023-11-19 05:19:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:19:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 05:19:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:23,093 INFO L225 Difference]: With dead ends: 30 [2023-11-19 05:19:23,093 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 05:19:23,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:19:23,096 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:23,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:19:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 05:19:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 05:19:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2023-11-19 05:19:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-19 05:19:23,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2023-11-19 05:19:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:23,104 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-19 05:19:23,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-19 05:19:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:19:23,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:23,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:23,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:19:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:23,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:23,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1746656338, now seen corresponding path program 2 times [2023-11-19 05:19:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:23,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256288874] [2023-11-19 05:19:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:19:23,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:23,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256288874] [2023-11-19 05:19:23,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256288874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194329858] [2023-11-19 05:19:23,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:19:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:23,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:23,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:19:23,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:19:23,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:19:23,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:19:23,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:19:23,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:19:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194329858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117892471] [2023-11-19 05:19:23,916 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:19:23,917 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:23,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:23,918 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:23,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:19:24,332 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:19:24,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |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_~incr~0#1| 2147483647))' at error location [2023-11-19 05:19:24,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:19:24,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:19:24,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 05:19:24,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173459234] [2023-11-19 05:19:24,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:19:24,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:19:24,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:24,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:19:24,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:19:24,547 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2023-11-19 05:19:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:24,668 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2023-11-19 05:19:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:19:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 19 [2023-11-19 05:19:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:24,671 INFO L225 Difference]: With dead ends: 54 [2023-11-19 05:19:24,671 INFO L226 Difference]: Without dead ends: 39 [2023-11-19 05:19:24,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:19:24,675 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:24,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-19 05:19:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-19 05:19:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2023-11-19 05:19:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-19 05:19:24,696 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2023-11-19 05:19:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:24,696 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-19 05:19:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2023-11-19 05:19:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-19 05:19:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:19:24,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:24,698 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:19:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:24,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:24,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1290338514, now seen corresponding path program 3 times [2023-11-19 05:19:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:24,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606042041] [2023-11-19 05:19:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:24,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-19 05:19:25,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606042041] [2023-11-19 05:19:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606042041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894948716] [2023-11-19 05:19:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:19:25,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:25,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:25,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:19:25,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:19:25,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:19:25,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:19:25,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-19 05:19:25,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-19 05:19:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894948716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058818426] [2023-11-19 05:19:25,773 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:19:25,774 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:25,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:25,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:25,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:19:26,050 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:19:26,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |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_~incr~0#1| 2147483647))' at error location [2023-11-19 05:19:26,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:19:26,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:19:26,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-19 05:19:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741391637] [2023-11-19 05:19:26,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:19:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 05:19:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 05:19:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:19:26,279 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2023-11-19 05:19:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:26,484 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2023-11-19 05:19:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 05:19:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 [2023-11-19 05:19:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:26,486 INFO L225 Difference]: With dead ends: 102 [2023-11-19 05:19:26,486 INFO L226 Difference]: Without dead ends: 75 [2023-11-19 05:19:26,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:19:26,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:26,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-19 05:19:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-19 05:19:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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) [2023-11-19 05:19:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2023-11-19 05:19:26,502 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2023-11-19 05:19:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:26,502 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2023-11-19 05:19:26,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2023-11-19 05:19:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2023-11-19 05:19:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:19:26,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:26,505 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:26,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 05:19:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:26,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:26,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1519217106, now seen corresponding path program 4 times [2023-11-19 05:19:26,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:26,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679183405] [2023-11-19 05:19:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:26,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-19 05:19:27,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:27,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679183405] [2023-11-19 05:19:27,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679183405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:27,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827255765] [2023-11-19 05:19:27,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:19:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:27,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:27,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:19:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:28,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:19:28,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-19 05:19:28,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-19 05:19:29,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827255765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:29,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210723463] [2023-11-19 05:19:29,090 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:19:29,090 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:29,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:29,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:29,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:19:29,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:19:30,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |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_~incr~0#1| 2147483647))' at error location [2023-11-19 05:19:30,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:19:30,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:19:30,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-19 05:19:30,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755384197] [2023-11-19 05:19:30,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:19:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 05:19:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 05:19:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 05:19:30,393 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2023-11-19 05:19:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:30,929 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2023-11-19 05:19:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 05:19:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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 73 [2023-11-19 05:19:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:30,937 INFO L225 Difference]: With dead ends: 198 [2023-11-19 05:19:30,937 INFO L226 Difference]: Without dead ends: 147 [2023-11-19 05:19:30,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 167 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 05:19:30,941 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:30,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:19:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-19 05:19:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-19 05:19:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 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) [2023-11-19 05:19:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2023-11-19 05:19:30,983 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2023-11-19 05:19:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:30,983 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2023-11-19 05:19:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2023-11-19 05:19:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2023-11-19 05:19:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-19 05:19:30,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:30,993 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:31,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:19:31,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:31,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:31,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -946947118, now seen corresponding path program 5 times [2023-11-19 05:19:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240592068] [2023-11-19 05:19:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2023-11-19 05:19:34,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240592068] [2023-11-19 05:19:34,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240592068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45484237] [2023-11-19 05:19:34,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:19:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:34,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3dcc91-3536-487c-b9a4-2bbf47854ecf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process