./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/rlim_exit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_exit.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91 --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 d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:02:05,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:06,008 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:02:06,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:06,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:06,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:06,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:06,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:06,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:06,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:06,073 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:06,074 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:06,075 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:06,077 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:02:06,077 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:06,077 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:06,078 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:02:06,078 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:02:06,079 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:06,079 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:02:06,081 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:02:06,082 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:02:06,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:06,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:06,084 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:02:06,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:02:06,085 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:02:06,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:06,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:06,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:06,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:06,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:02:06,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:06,088 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:06,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:06,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:06,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:06,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:06,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:06,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:06,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:06,091 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:02:06,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:02:06,091 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:06,092 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:06,092 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:06,092 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:06,093 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_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f [2023-11-25 00:02:06,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:06,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:06,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:06,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:06,436 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:06,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/float-benchs/rlim_exit.c [2023-11-25 00:02:09,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:09,724 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:09,725 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/sv-benchmarks/c/float-benchs/rlim_exit.c [2023-11-25 00:02:09,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/data/a30312241/848021574d5845fa9b7438c1f8000649/FLAG825df8631 [2023-11-25 00:02:09,750 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/data/a30312241/848021574d5845fa9b7438c1f8000649 [2023-11-25 00:02:09,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:09,755 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:09,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:09,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:09,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:09,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:09" (1/1) ... [2023-11-25 00:02:09,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b091b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:09, skipping insertion in model container [2023-11-25 00:02:09,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:09" (1/1) ... [2023-11-25 00:02:09,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:09,963 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_ff9fa829-f30f-4a88-92dd-daca471b57e6/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2023-11-25 00:02:09,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:09,997 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:10,012 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_ff9fa829-f30f-4a88-92dd-daca471b57e6/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2023-11-25 00:02:10,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:10,042 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:10,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10 WrapperNode [2023-11-25 00:02:10,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:10,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:10,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:10,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:10,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,096 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-11-25 00:02:10,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:10,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:10,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:10,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:10,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,135 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,148 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:10,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:10,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:10,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:10,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (1/1) ... [2023-11-25 00:02:10,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:10,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:10,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:02:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:02:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:10,313 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:10,316 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:10,442 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:10,517 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:10,517 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:02:10,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:10 BoogieIcfgContainer [2023-11-25 00:02:10,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:10,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:10,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:10,526 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:10,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:09" (1/3) ... [2023-11-25 00:02:10,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc99dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:10, skipping insertion in model container [2023-11-25 00:02:10,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:10" (2/3) ... [2023-11-25 00:02:10,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc99dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:10, skipping insertion in model container [2023-11-25 00:02:10,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:10" (3/3) ... [2023-11-25 00:02:10,530 INFO L112 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2023-11-25 00:02:10,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:10,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:02:10,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:10,666 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;@318ec1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:10,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:02:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:02:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:02:10,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:10,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:02:10,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2680294, now seen corresponding path program 1 times [2023-11-25 00:02:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:10,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980059001] [2023-11-25 00:02:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:10,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980059001] [2023-11-25 00:02:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980059001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:10,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:02:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83938994] [2023-11-25 00:02:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:02:10,920 INFO L87 Difference]: Start difference. First operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-25 00:02:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:10,962 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-11-25 00:02:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-25 00:02:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:10,973 INFO L225 Difference]: With dead ends: 21 [2023-11-25 00:02:10,973 INFO L226 Difference]: Without dead ends: 14 [2023-11-25 00:02:10,976 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 [2023-11-25 00:02:10,980 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:10,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-25 00:02:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2023-11-25 00:02:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:02:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-25 00:02:11,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2023-11-25 00:02:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:11,024 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-25 00:02:11,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-25 00:02:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-25 00:02:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:02:11,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:11,026 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:11,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:11,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:11,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -695491792, now seen corresponding path program 1 times [2023-11-25 00:02:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575905265] [2023-11-25 00:02:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:11,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:11,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575905265] [2023-11-25 00:02:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575905265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588707131] [2023-11-25 00:02:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:11,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:11,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:11,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:11,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:02:11,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:11,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:11,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588707131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664973371] [2023-11-25 00:02:11,391 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:02:11,392 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:11,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:11,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:11,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:12,550 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-25 00:02:12,552 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:12,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '134#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:02:12,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:12,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-25 00:02:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078003983] [2023-11-25 00:02:12,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:02:12,906 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:02:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:12,953 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-11-25 00:02:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 12 [2023-11-25 00:02:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:12,955 INFO L225 Difference]: With dead ends: 26 [2023-11-25 00:02:12,955 INFO L226 Difference]: Without dead ends: 23 [2023-11-25 00:02:12,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:02:12,957 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:12,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-25 00:02:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-25 00:02:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-25 00:02:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-25 00:02:12,967 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2023-11-25 00:02:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:12,967 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-25 00:02:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:02:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-25 00:02:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-25 00:02:12,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:12,971 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-25 00:02:12,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-25 00:02:13,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:13,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1212047118, now seen corresponding path program 2 times [2023-11-25 00:02:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:13,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067402335] [2023-11-25 00:02:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:02:13,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:13,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067402335] [2023-11-25 00:02:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067402335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:13,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027359382] [2023-11-25 00:02:13,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:13,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:13,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:13,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:13,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:13,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-25 00:02:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:13,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:02:13,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:02:13,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:02:13,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027359382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:13,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149454081] [2023-11-25 00:02:13,805 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:02:13,805 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:13,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:13,806 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:13,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:14,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-25 00:02:14,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:14,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:02:14,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:14,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:14,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-25 00:02:14,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319176821] [2023-11-25 00:02:14,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:14,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:02:14,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:02:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:02:14,613 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-25 00:02:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:14,709 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-11-25 00:02:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:02:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 36 [2023-11-25 00:02:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:14,712 INFO L225 Difference]: With dead ends: 50 [2023-11-25 00:02:14,712 INFO L226 Difference]: Without dead ends: 47 [2023-11-25 00:02:14,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:02:14,714 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:14,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-25 00:02:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-25 00:02:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-25 00:02:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-11-25 00:02:14,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2023-11-25 00:02:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:14,728 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-11-25 00:02:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-25 00:02:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-11-25 00:02:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-25 00:02:14,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:14,732 INFO L195 NwaCegarLoop]: trace histogram [20, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-25 00:02:14,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:02:14,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:14,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:14,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -795399990, now seen corresponding path program 3 times [2023-11-25 00:02:14,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262001919] [2023-11-25 00:02:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-25 00:02:15,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:15,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262001919] [2023-11-25 00:02:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262001919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490270083] [2023-11-25 00:02:15,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:02:15,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:15,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:15,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:02:15,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:02:15,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:15,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-25 00:02:15,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-25 00:02:15,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-25 00:02:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490270083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304182523] [2023-11-25 00:02:15,987 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:02:15,987 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:15,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:15,988 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:15,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:16,410 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-25 00:02:16,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:16,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:02:16,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:16,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-25 00:02:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157988637] [2023-11-25 00:02:16,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:16,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-25 00:02:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-25 00:02:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:02:16,935 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-25 00:02:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:17,163 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2023-11-25 00:02:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-25 00:02:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) Word has length 84 [2023-11-25 00:02:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:17,167 INFO L225 Difference]: With dead ends: 98 [2023-11-25 00:02:17,167 INFO L226 Difference]: Without dead ends: 95 [2023-11-25 00:02:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 224 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:02:17,179 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:17,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-25 00:02:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-25 00:02:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-25 00:02:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 138 transitions. [2023-11-25 00:02:17,202 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 138 transitions. Word has length 84 [2023-11-25 00:02:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:17,203 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 138 transitions. [2023-11-25 00:02:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-25 00:02:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 138 transitions. [2023-11-25 00:02:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-25 00:02:17,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:17,211 INFO L195 NwaCegarLoop]: trace histogram [44, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-25 00:02:17,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-25 00:02:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:17,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:17,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1184760898, now seen corresponding path program 4 times [2023-11-25 00:02:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527062375] [2023-11-25 00:02:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2023-11-25 00:02:18,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527062375] [2023-11-25 00:02:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527062375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:18,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860795478] [2023-11-25 00:02:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:02:18,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:18,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:18,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:02:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:18,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:02:18,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2023-11-25 00:02:18,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2023-11-25 00:02:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860795478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235631467] [2023-11-25 00:02:20,080 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:02:20,080 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:20,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:20,081 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:20,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:20,494 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-25 00:02:20,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:21,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2588#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:02:21,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:21,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:21,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-11-25 00:02:21,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799917331] [2023-11-25 00:02:21,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:21,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-25 00:02:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-25 00:02:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=1818, Unknown=0, NotChecked=0, Total=2970 [2023-11-25 00:02:21,501 INFO L87 Difference]: Start difference. First operand 95 states and 138 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-25 00:02:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:21,967 INFO L93 Difference]: Finished difference Result 194 states and 308 transitions. [2023-11-25 00:02:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-25 00:02:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) Word has length 180 [2023-11-25 00:02:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:21,973 INFO L225 Difference]: With dead ends: 194 [2023-11-25 00:02:21,973 INFO L226 Difference]: Without dead ends: 191 [2023-11-25 00:02:21,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 488 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1152, Invalid=1818, Unknown=0, NotChecked=0, Total=2970 [2023-11-25 00:02:21,976 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:21,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:02:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-25 00:02:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-25 00:02:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-25 00:02:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 282 transitions. [2023-11-25 00:02:22,009 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 282 transitions. Word has length 180 [2023-11-25 00:02:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:22,011 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 282 transitions. [2023-11-25 00:02:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-25 00:02:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 282 transitions. [2023-11-25 00:02:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-25 00:02:22,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:22,022 INFO L195 NwaCegarLoop]: trace histogram [92, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-25 00:02:22,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:22,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:22,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:22,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2076124366, now seen corresponding path program 5 times [2023-11-25 00:02:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:22,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455827932] [2023-11-25 00:02:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2023-11-25 00:02:25,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455827932] [2023-11-25 00:02:25,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455827932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:25,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195807348] [2023-11-25 00:02:25,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:25,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:25,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:25,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:25,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:02:26,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2023-11-25 00:02:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:26,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-25 00:02:26,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2023-11-25 00:02:26,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2023-11-25 00:02:30,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195807348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689229716] [2023-11-25 00:02:30,673 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:02:30,674 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:30,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:30,674 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:30,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:31,049 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-25 00:02:31,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:33,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5582#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:02:33,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:33,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2023-11-25 00:02:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772337906] [2023-11-25 00:02:33,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:33,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-25 00:02:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-25 00:02:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4584, Invalid=5922, Unknown=0, NotChecked=0, Total=10506 [2023-11-25 00:02:33,886 INFO L87 Difference]: Start difference. First operand 191 states and 282 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) [2023-11-25 00:02:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:34,904 INFO L93 Difference]: Finished difference Result 386 states and 620 transitions. [2023-11-25 00:02:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-25 00:02:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) Word has length 372 [2023-11-25 00:02:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:34,912 INFO L225 Difference]: With dead ends: 386 [2023-11-25 00:02:34,912 INFO L226 Difference]: Without dead ends: 383 [2023-11-25 00:02:34,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1163 GetRequests, 1016 SyntacticMatches, 46 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7468 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4584, Invalid=5922, Unknown=0, NotChecked=0, Total=10506 [2023-11-25 00:02:34,918 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:34,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:02:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-25 00:02:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2023-11-25 00:02:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-25 00:02:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 570 transitions. [2023-11-25 00:02:34,978 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 570 transitions. Word has length 372 [2023-11-25 00:02:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:34,980 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 570 transitions. [2023-11-25 00:02:34,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) [2023-11-25 00:02:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 570 transitions. [2023-11-25 00:02:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2023-11-25 00:02:35,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:35,014 INFO L195 NwaCegarLoop]: trace histogram [188, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1] [2023-11-25 00:02:35,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-25 00:02:35,231 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:35,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 668666130, now seen corresponding path program 6 times [2023-11-25 00:02:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589691181] [2023-11-25 00:02:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2023-11-25 00:02:47,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589691181] [2023-11-25 00:02:47,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589691181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442483392] [2023-11-25 00:02:47,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:02:47,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:47,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:47,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:47,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9fa829-f30f-4a88-92dd-daca471b57e6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:02:47,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:02:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:47,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-25 00:02:47,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2023-11-25 00:02:48,597 INFO L327 TraceCheckSpWp]: Computing backward predicates...