./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.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_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/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_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/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_d51d9b18-2f56-4323-bde7-666ba591fee6/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 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:59:30,102 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:59:30,222 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:59:30,233 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:59:30,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:59:30,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:59:30,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:59:30,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:59:30,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:59:30,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:59:30,298 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:59:30,300 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:59:30,300 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:59:30,302 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:59:30,303 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:59:30,303 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:59:30,303 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:59:30,304 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:59:30,304 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:59:30,305 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:59:30,305 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:59:30,306 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:59:30,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:59:30,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:59:30,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:59:30,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:59:30,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:59:30,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:59:30,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:59:30,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:59:30,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:59:30,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:59:30,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:59:30,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:59:30,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:59:30,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:59:30,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:59:30,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:30,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:59:30,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:59:30,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:59:30,332 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:59:30,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:59:30,333 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:59:30,333 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:59:30,333 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:59:30,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:59:30,334 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_d51d9b18-2f56-4323-bde7-666ba591fee6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a [2023-11-24 23:59:30,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:59:30,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:59:30,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:59:30,697 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:59:30,697 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:59:30,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2023-11-24 23:59:33,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:59:34,556 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:59:34,557 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2023-11-24 23:59:34,631 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/data/f5269a9bf/fbf6720473934aba9491625cbaf2ee21/FLAG0fba9f4b3 [2023-11-24 23:59:34,648 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/data/f5269a9bf/fbf6720473934aba9491625cbaf2ee21 [2023-11-24 23:59:34,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:59:34,656 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:59:34,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:34,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:59:34,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:59:34,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:34" (1/1) ... [2023-11-24 23:59:34,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73723ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:34, skipping insertion in model container [2023-11-24 23:59:34,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:34" (1/1) ... [2023-11-24 23:59:34,989 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:59:37,452 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_d51d9b18-2f56-4323-bde7-666ba591fee6/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2023-11-24 23:59:37,493 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_d51d9b18-2f56-4323-bde7-666ba591fee6/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2023-11-24 23:59:37,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:37,782 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:59:39,054 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_d51d9b18-2f56-4323-bde7-666ba591fee6/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2023-11-24 23:59:39,066 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_d51d9b18-2f56-4323-bde7-666ba591fee6/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2023-11-24 23:59:39,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:39,161 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:59:39,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39 WrapperNode [2023-11-24 23:59:39,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:39,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:39,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:59:39,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:59:39,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:39,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:39,743 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-11-24 23:59:39,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:39,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:59:39,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:59:39,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:59:39,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:39,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:39,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:39,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:59:40,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:59:40,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:59:40,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:59:40,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (1/1) ... [2023-11-24 23:59:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:40,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:59:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:59:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:59:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:59:40,610 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:59:40,610 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:59:40,610 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:59:40,610 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:59:40,610 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:59:40,611 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:59:40,611 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:59:40,611 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:59:40,611 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:59:40,611 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:59:40,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:59:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:59:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:59:40,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:59:40,766 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:59:40,768 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:59:50,423 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:59:52,950 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:59:52,951 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-24 23:59:52,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:52 BoogieIcfgContainer [2023-11-24 23:59:52,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:59:52,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:59:52,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:59:52,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:59:52,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:59:34" (1/3) ... [2023-11-24 23:59:52,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1e6044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:52, skipping insertion in model container [2023-11-24 23:59:52,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:39" (2/3) ... [2023-11-24 23:59:52,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1e6044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:52, skipping insertion in model container [2023-11-24 23:59:52,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:52" (3/3) ... [2023-11-24 23:59:52,969 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.07.cil-1.c [2023-11-24 23:59:52,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:59:52,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:59:53,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:59:53,112 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;@4219169d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:59:53,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:59:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-24 23:59:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:59:53,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:53,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:53,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:53,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1070761120, now seen corresponding path program 1 times [2023-11-24 23:59:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743729421] [2023-11-24 23:59:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:59:53,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743729421] [2023-11-24 23:59:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743729421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:53,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:53,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536699590] [2023-11-24 23:59:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:53,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:53,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:53,885 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:59:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:55,004 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-11-24 23:59:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-24 23:59:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:55,032 INFO L225 Difference]: With dead ends: 3692 [2023-11-24 23:59:55,033 INFO L226 Difference]: Without dead ends: 1907 [2023-11-24 23:59:55,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:55,045 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:55,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:59:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-24 23:59:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-11-24 23:59:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-24 23:59:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-11-24 23:59:55,208 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-11-24 23:59:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:55,209 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-11-24 23:59:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:59:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-11-24 23:59:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:59:55,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:55,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:55,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:59:55,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:55,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -60982499, now seen corresponding path program 1 times [2023-11-24 23:59:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327293079] [2023-11-24 23:59:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:55,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327293079] [2023-11-24 23:59:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327293079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981750771] [2023-11-24 23:59:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:55,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:55,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:55,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:59:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:55,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:55,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:59:56,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:56,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981750771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:59:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474025063] [2023-11-24 23:59:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:56,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:56,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:56,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:56,077 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:56,652 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-11-24 23:59:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:56,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:59:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:56,674 INFO L225 Difference]: With dead ends: 2419 [2023-11-24 23:59:56,674 INFO L226 Difference]: Without dead ends: 2159 [2023-11-24 23:59:56,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:56,679 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:56,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-11-24 23:59:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-11-24 23:59:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-24 23:59:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-11-24 23:59:56,790 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-11-24 23:59:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:56,791 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-11-24 23:59:56,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-11-24 23:59:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:59:56,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:56,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:56,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:57,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 23:59:57,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:57,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1645820005, now seen corresponding path program 1 times [2023-11-24 23:59:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484842281] [2023-11-24 23:59:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:57,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:57,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484842281] [2023-11-24 23:59:57,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484842281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103060842] [2023-11-24 23:59:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:57,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:57,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:57,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:57,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:59:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:57,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:57,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:59:57,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103060842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:57,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:57,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:59:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149340464] [2023-11-24 23:59:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:57,566 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:58,129 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-11-24 23:59:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:59:58,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:58,148 INFO L225 Difference]: With dead ends: 3160 [2023-11-24 23:59:58,148 INFO L226 Difference]: Without dead ends: 2651 [2023-11-24 23:59:58,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:58,153 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:58,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-24 23:59:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-11-24 23:59:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-24 23:59:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-11-24 23:59:58,268 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-11-24 23:59:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:58,269 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-11-24 23:59:58,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-11-24 23:59:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:59:58,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:58,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:58,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 23:59:58,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:58,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1099614873, now seen corresponding path program 1 times [2023-11-24 23:59:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:58,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592405631] [2023-11-24 23:59:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:58,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:58,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592405631] [2023-11-24 23:59:58,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592405631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:58,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244606818] [2023-11-24 23:59:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:58,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:58,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:58,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:58,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:59:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:58,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:58,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 23:59:58,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:58,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244606818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:58,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:58,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:59:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894594940] [2023-11-24 23:59:58,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:58,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:58,940 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:59,505 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-11-24 23:59:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:59:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:59,529 INFO L225 Difference]: With dead ends: 4618 [2023-11-24 23:59:59,530 INFO L226 Difference]: Without dead ends: 3619 [2023-11-24 23:59:59,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:59,536 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:59,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-11-24 23:59:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-11-24 23:59:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-24 23:59:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-11-24 23:59:59,726 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-11-24 23:59:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:59,726 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-11-24 23:59:59,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:59:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-11-24 23:59:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:59:59,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:59,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:59,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:59,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-24 23:59:59,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:59,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1780958555, now seen corresponding path program 1 times [2023-11-24 23:59:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:59,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49751081] [2023-11-24 23:59:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:00:00,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49751081] [2023-11-25 00:00:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49751081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45743545] [2023-11-25 00:00:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:00,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:00,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:00,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:00,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:00:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:00,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:00:00,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:00:00,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45743545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:00,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:00:00,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:00:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243562488] [2023-11-25 00:00:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:00:00,409 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:00:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:01,322 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-11-25 00:00:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-25 00:00:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:01,363 INFO L225 Difference]: With dead ends: 7486 [2023-11-25 00:00:01,364 INFO L226 Difference]: Without dead ends: 5523 [2023-11-25 00:00:01,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:00:01,377 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:01,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:00:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-25 00:00:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-11-25 00:00:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-25 00:00:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-11-25 00:00:01,714 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-11-25 00:00:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:01,715 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-11-25 00:00:01,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:00:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-11-25 00:00:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-25 00:00:01,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:01,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:01,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:01,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:01,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1915691303, now seen corresponding path program 1 times [2023-11-25 00:00:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771261986] [2023-11-25 00:00:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-25 00:00:02,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771261986] [2023-11-25 00:00:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771261986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857710968] [2023-11-25 00:00:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:02,088 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-25 00:00:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:02,936 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-11-25 00:00:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-11-25 00:00:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:02,992 INFO L225 Difference]: With dead ends: 8563 [2023-11-25 00:00:02,992 INFO L226 Difference]: Without dead ends: 6593 [2023-11-25 00:00:03,002 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 [2023-11-25 00:00:03,002 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:03,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:00:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-25 00:00:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-11-25 00:00:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-25 00:00:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-11-25 00:00:03,403 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-11-25 00:00:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:03,405 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-11-25 00:00:03,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-25 00:00:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-11-25 00:00:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-25 00:00:03,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:03,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:03,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:00:03,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:03,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1625809342, now seen corresponding path program 1 times [2023-11-25 00:00:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:03,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723290245] [2023-11-25 00:00:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-25 00:00:03,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723290245] [2023-11-25 00:00:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723290245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:03,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:03,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700248113] [2023-11-25 00:00:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:03,577 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:04,598 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-11-25 00:00:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-25 00:00:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:04,649 INFO L225 Difference]: With dead ends: 15382 [2023-11-25 00:00:04,650 INFO L226 Difference]: Without dead ends: 10755 [2023-11-25 00:00:04,664 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 [2023-11-25 00:00:04,665 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:04,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:00:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-11-25 00:00:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-11-25 00:00:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-25 00:00:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-11-25 00:00:05,152 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-11-25 00:00:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:05,153 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-11-25 00:00:05,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-11-25 00:00:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-25 00:00:05,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:05,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:00:05,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:05,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 915350458, now seen corresponding path program 1 times [2023-11-25 00:00:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:05,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950054335] [2023-11-25 00:00:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:05,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-25 00:00:05,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:05,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950054335] [2023-11-25 00:00:05,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950054335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:05,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403597842] [2023-11-25 00:00:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:05,321 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:06,499 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-11-25 00:00:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-25 00:00:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:06,600 INFO L225 Difference]: With dead ends: 28534 [2023-11-25 00:00:06,601 INFO L226 Difference]: Without dead ends: 19475 [2023-11-25 00:00:06,630 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 [2023-11-25 00:00:06,631 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:06,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:00:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-11-25 00:00:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-11-25 00:00:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-25 00:00:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-11-25 00:00:07,466 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-11-25 00:00:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:07,468 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-11-25 00:00:07,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-11-25 00:00:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-25 00:00:07,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:07,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:07,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:00:07,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:07,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1111234249, now seen corresponding path program 1 times [2023-11-25 00:00:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398874409] [2023-11-25 00:00:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-25 00:00:07,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:07,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398874409] [2023-11-25 00:00:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398874409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:07,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:07,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769464336] [2023-11-25 00:00:07,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:07,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:07,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:07,661 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:09,333 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-11-25 00:00:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-25 00:00:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:09,487 INFO L225 Difference]: With dead ends: 54262 [2023-11-25 00:00:09,487 INFO L226 Difference]: Without dead ends: 36531 [2023-11-25 00:00:09,557 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 [2023-11-25 00:00:09,560 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:09,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:00:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2023-11-25 00:00:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2023-11-25 00:00:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-11-25 00:00:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2023-11-25 00:00:11,721 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2023-11-25 00:00:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:11,722 INFO L495 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2023-11-25 00:00:11,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:00:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2023-11-25 00:00:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-25 00:00:11,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:11,855 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:00:11,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:11,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash 318235327, now seen corresponding path program 1 times [2023-11-25 00:00:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187917275] [2023-11-25 00:00:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:00:12,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187917275] [2023-11-25 00:00:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187917275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937678546] [2023-11-25 00:00:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:12,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:12,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51d9b18-2f56-4323-bde7-666ba591fee6/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:00:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:12,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:00:12,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-25 00:00:13,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:00:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:00:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937678546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:00:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285944029] [2023-11-25 00:00:13,901 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-11-25 00:00:13,902 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:00:13,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:00:13,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:00:13,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs