./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/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_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/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_271895b6-67fd-4134-b9bf-611f14832850/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:56:58,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:56:58,915 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:56:58,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:56:58,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:56:58,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:56:58,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:56:58,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:56:58,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:56:58,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:56:58,978 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:56:58,979 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:56:58,979 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:56:58,980 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:56:58,980 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:56:58,981 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:56:58,981 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:56:58,982 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:56:58,982 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:56:58,983 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:56:58,991 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:56:58,991 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:56:58,993 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:56:58,993 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:56:58,995 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:56:58,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:56:58,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:56:58,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:56:58,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:56:58,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:56:58,999 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:56:58,999 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:56:58,999 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:56:59,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:56:59,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:56:59,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:56:59,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:56:59,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:56:59,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:56:59,002 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:56:59,002 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:56:59,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:56:59,003 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:56:59,003 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:56:59,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:56:59,004 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_271895b6-67fd-4134-b9bf-611f14832850/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2023-11-19 04:56:59,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:56:59,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:56:59,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:56:59,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:56:59,427 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:56:59,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-11-19 04:57:02,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:57:02,966 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:57:02,966 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-11-19 04:57:02,977 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/data/4628b05b4/2912374b4d5c4d15ad4f37c54d48f3a6/FLAGcda2ddd92 [2023-11-19 04:57:03,248 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/data/4628b05b4/2912374b4d5c4d15ad4f37c54d48f3a6 [2023-11-19 04:57:03,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:57:03,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:57:03,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:03,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:57:03,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:57:03,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ec85f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03, skipping insertion in model container [2023-11-19 04:57:03,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:57:03,482 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_271895b6-67fd-4134-b9bf-611f14832850/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-11-19 04:57:03,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:03,519 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:57:03,531 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_271895b6-67fd-4134-b9bf-611f14832850/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-11-19 04:57:03,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:03,560 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:57:03,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03 WrapperNode [2023-11-19 04:57:03,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:03,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:03,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:57:03,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:57:03,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,604 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2023-11-19 04:57:03,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:03,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:57:03,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:57:03,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:57:03,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:57:03,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:57:03,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:57:03,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:57:03,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (1/1) ... [2023-11-19 04:57:03,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:57:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:03,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:57:03,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:57:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:57:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:57:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:57:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:57:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:57:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:57:03,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:57:03,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:57:03,796 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:57:03,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:57:04,078 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:57:04,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:57:04,253 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 04:57:04,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:04 BoogieIcfgContainer [2023-11-19 04:57:04,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:57:04,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:57:04,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:57:04,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:57:04,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:57:03" (1/3) ... [2023-11-19 04:57:04,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fafb30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:04, skipping insertion in model container [2023-11-19 04:57:04,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:03" (2/3) ... [2023-11-19 04:57:04,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fafb30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:04, skipping insertion in model container [2023-11-19 04:57:04,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:04" (3/3) ... [2023-11-19 04:57:04,267 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-11-19 04:57:04,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:57:04,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:57:04,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:57:04,334 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;@2c175c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:57:04,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:57:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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 04:57:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:57:04,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:04,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:04,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:04,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 427680054, now seen corresponding path program 1 times [2023-11-19 04:57:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82144553] [2023-11-19 04:57:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:04,642 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 04:57:04,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82144553] [2023-11-19 04:57:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82144553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5547096] [2023-11-19 04:57:04,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:04,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:04,686 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:57:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:04,790 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2023-11-19 04:57:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:57:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:04,800 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:57:04,801 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 04:57:04,804 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 04:57:04,808 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 04:57:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-19 04:57:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 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 04:57:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2023-11-19 04:57:04,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2023-11-19 04:57:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:04,841 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2023-11-19 04:57:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:57:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2023-11-19 04:57:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:57:04,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:04,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:57:04,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:04,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1288425971, now seen corresponding path program 1 times [2023-11-19 04:57:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:04,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132706091] [2023-11-19 04:57:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:57:05,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132706091] [2023-11-19 04:57:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132706091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:05,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414518986] [2023-11-19 04:57:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:05,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:05,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:05,055 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 04:57:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:05,111 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-11-19 04:57:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:57:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 04:57:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:05,113 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:57:05,114 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 04:57:05,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:05,122 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:05,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:57:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 04:57:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-11-19 04:57:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 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 04:57:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2023-11-19 04:57:05,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2023-11-19 04:57:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:05,138 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2023-11-19 04:57:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 04:57:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2023-11-19 04:57:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:57:05,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:05,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:57:05,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:05,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1643959839, now seen corresponding path program 1 times [2023-11-19 04:57:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771537318] [2023-11-19 04:57:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:57:05,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:05,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771537318] [2023-11-19 04:57:05,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771537318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:05,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:05,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896050523] [2023-11-19 04:57:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:05,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:05,290 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 04:57:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:05,327 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2023-11-19 04:57:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:05,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:57:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:05,328 INFO L225 Difference]: With dead ends: 27 [2023-11-19 04:57:05,329 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:57:05,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:57:05,331 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:05,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:57:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:57:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:57:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 04:57:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-19 04:57:05,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2023-11-19 04:57:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:05,350 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-19 04:57:05,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 04:57:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-19 04:57:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:57:05,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:05,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:57:05,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:05,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1366269224, now seen corresponding path program 1 times [2023-11-19 04:57:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505685791] [2023-11-19 04:57:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:05,595 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 04:57:05,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:05,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505685791] [2023-11-19 04:57:05,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505685791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:05,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880556471] [2023-11-19 04:57:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:05,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:05,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:05,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:57:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:05,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:57:05,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:05,787 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 04:57:05,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:05,826 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 04:57:05,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880556471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:05,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654365229] [2023-11-19 04:57:05,853 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-19 04:57:05,853 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:05,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:05,864 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:05,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:07,063 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1654365229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:07,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2023-11-19 04:57:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988769328] [2023-11-19 04:57:07,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:57:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:57:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:57:07,682 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 04:57:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:08,054 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-11-19 04:57:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:57:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 15 [2023-11-19 04:57:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:08,057 INFO L225 Difference]: With dead ends: 38 [2023-11-19 04:57:08,058 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 04:57:08,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-19 04:57:08,066 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:08,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 04:57:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-19 04:57:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 04:57:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-19 04:57:08,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2023-11-19 04:57:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:08,084 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-19 04:57:08,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 04:57:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-19 04:57:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:57:08,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:08,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:08,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:08,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:08,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:08,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1964351942, now seen corresponding path program 1 times [2023-11-19 04:57:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:08,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794758966] [2023-11-19 04:57:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:08,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:57:08,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794758966] [2023-11-19 04:57:08,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794758966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205047190] [2023-11-19 04:57:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:08,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:08,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:08,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:57:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:08,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:57:08,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:57:08,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:57:08,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205047190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:08,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211159317] [2023-11-19 04:57:08,764 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:57:08,764 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:08,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:08,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:08,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:09,918 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:10,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '537#(and (= |ULTIMATE.start_main_#t~mem20#1| (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) 0)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:57:10,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:57:10,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:10,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-19 04:57:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127911791] [2023-11-19 04:57:10,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:57:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:57:10,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:57:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:57:10,821 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 04:57:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:11,078 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-11-19 04:57:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:57:11,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 19 [2023-11-19 04:57:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:11,080 INFO L225 Difference]: With dead ends: 84 [2023-11-19 04:57:11,080 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 04:57:11,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-11-19 04:57:11,082 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:11,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 29 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 04:57:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2023-11-19 04:57:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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 04:57:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-11-19 04:57:11,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-11-19 04:57:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:11,095 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-11-19 04:57:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 04:57:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-11-19 04:57:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:57:11,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:11,097 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:11,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:11,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 658129974, now seen corresponding path program 2 times [2023-11-19 04:57:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572031632] [2023-11-19 04:57:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:57:11,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572031632] [2023-11-19 04:57:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572031632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853423699] [2023-11-19 04:57:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:57:11,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:11,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:11,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:57:11,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:57:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:57:11,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:57:11,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:11,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-11-19 04:57:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:57:11,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:11,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2023-11-19 04:57:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:57:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853423699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1206566987] [2023-11-19 04:57:11,916 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:57:11,916 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:11,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:11,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:11,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:12,881 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:13,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (= |ULTIMATE.start_main_#t~mem20#1| (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) 0)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:57:13,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:57:13,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-19 04:57:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388872365] [2023-11-19 04:57:13,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:57:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 04:57:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 04:57:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2023-11-19 04:57:13,784 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 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 04:57:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:14,696 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2023-11-19 04:57:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-19 04:57:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 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 23 [2023-11-19 04:57:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:14,705 INFO L225 Difference]: With dead ends: 201 [2023-11-19 04:57:14,705 INFO L226 Difference]: Without dead ends: 177 [2023-11-19 04:57:14,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=925, Invalid=2857, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:57:14,712 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 367 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:14,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 71 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:57:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-19 04:57:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 43. [2023-11-19 04:57:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 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 04:57:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2023-11-19 04:57:14,754 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 23 [2023-11-19 04:57:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:14,754 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2023-11-19 04:57:14,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 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 04:57:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2023-11-19 04:57:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:57:14,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:14,757 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:14,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:14,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:14,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash -92630696, now seen corresponding path program 1 times [2023-11-19 04:57:14,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:14,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046843285] [2023-11-19 04:57:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:57:15,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046843285] [2023-11-19 04:57:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046843285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:15,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988628682] [2023-11-19 04:57:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:15,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:15,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:15,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:57:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:15,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 04:57:15,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:57:15,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:57:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988628682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068473990] [2023-11-19 04:57:15,694 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:57:15,695 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:15,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:15,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:15,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:16,588 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:17,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1513#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_133| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |v_ULTIMATE.start_main_~i~1#1_133|) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|))) (= |ULTIMATE.start_main_#t~mem20#1| (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) 0)) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 100000) (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:57:17,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:57:17,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:17,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-19 04:57:17,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768455452] [2023-11-19 04:57:17,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:57:17,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 04:57:17,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 04:57:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 04:57:17,402 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 04:57:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:17,483 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2023-11-19 04:57:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:57:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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) Word has length 28 [2023-11-19 04:57:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:17,485 INFO L225 Difference]: With dead ends: 90 [2023-11-19 04:57:17,485 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 04:57:17,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 04:57:17,487 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:17,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 04:57:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2023-11-19 04:57:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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 04:57:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2023-11-19 04:57:17,507 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 28 [2023-11-19 04:57:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:17,507 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2023-11-19 04:57:17,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 04:57:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2023-11-19 04:57:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 04:57:17,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:17,509 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:17,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:57:17,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1209128287, now seen corresponding path program 2 times [2023-11-19 04:57:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:17,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158118693] [2023-11-19 04:57:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:57:18,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158118693] [2023-11-19 04:57:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158118693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634455959] [2023-11-19 04:57:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:57:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:18,359 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:18,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:57:18,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:57:18,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:57:18,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:57:18,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 04:57:18,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 04:57:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634455959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003123579] [2023-11-19 04:57:18,703 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:57:18,703 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:18,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:18,703 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:18,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:19,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:20,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2016#(and (= |ULTIMATE.start_main_#t~mem20#1| (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) 0)) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 100000) (exists ((|v_ULTIMATE.start_main_~i~1#1_168| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |v_ULTIMATE.start_main_~i~1#1_168|) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|))) (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:57:20,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:57:20,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:20,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 26 [2023-11-19 04:57:20,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631074371] [2023-11-19 04:57:20,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:57:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 04:57:20,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 04:57:20,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 04:57:20,506 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 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 04:57:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:21,218 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2023-11-19 04:57:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 04:57:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 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 04:57:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:21,220 INFO L225 Difference]: With dead ends: 225 [2023-11-19 04:57:21,220 INFO L226 Difference]: Without dead ends: 191 [2023-11-19 04:57:21,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=745, Invalid=2561, Unknown=0, NotChecked=0, Total=3306 [2023-11-19 04:57:21,224 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 384 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:21,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 91 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:57:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-19 04:57:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 81. [2023-11-19 04:57:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 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 04:57:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2023-11-19 04:57:21,256 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 37 [2023-11-19 04:57:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:21,256 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2023-11-19 04:57:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 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 04:57:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2023-11-19 04:57:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:57:21,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:21,259 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:21,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:57:21,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2053783176, now seen corresponding path program 3 times [2023-11-19 04:57:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627937209] [2023-11-19 04:57:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 04:57:22,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627937209] [2023-11-19 04:57:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627937209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152738805] [2023-11-19 04:57:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:57:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:22,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_271895b6-67fd-4134-b9bf-611f14832850/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:57:22,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:57:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:57:22,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 04:57:22,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:22,971 INFO L349 Elim1Store]: treesize reduction 106, result has 24.3 percent of original size [2023-11-19 04:57:22,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 68 [2023-11-19 04:57:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 04:57:29,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:31,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2023-11-19 04:57:31,968 INFO L349 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2023-11-19 04:57:31,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 73 [2023-11-19 04:57:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 04:57:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152738805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429291073] [2023-11-19 04:57:32,049 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:57:32,049 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:32,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:32,050 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:32,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:57:33,360 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:57:34,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2864#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) |ULTIMATE.start_main_~#set~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (<= 2 ~SIZE~0) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:57:34,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:57:34,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:57:34,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2023-11-19 04:57:34,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676104935] [2023-11-19 04:57:34,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:57:34,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-19 04:57:34,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:34,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-19 04:57:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1761, Unknown=4, NotChecked=0, Total=2070 [2023-11-19 04:57:34,247 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 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 04:57:36,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:38,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:40,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:42,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:46,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:50,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:52,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:57:55,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]