./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/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 62eecaab9c99f0fa1c059eddca8c27b38035ebb18e1472cebfbee2848ace27b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:01:58,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:01:58,466 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:01:58,472 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:01:58,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:01:58,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:01:58,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:01:58,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:01:58,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:01:58,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:01:58,503 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:01:58,503 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:01:58,504 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:01:58,504 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:01:58,505 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:01:58,506 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:01:58,506 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:01:58,507 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:01:58,507 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:01:58,508 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:01:58,508 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:01:58,509 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:01:58,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:01:58,511 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:01:58,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:01:58,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:01:58,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:01:58,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:01:58,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:01:58,513 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:01:58,514 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:01:58,514 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:01:58,514 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:01:58,515 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:01:58,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:01:58,515 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:01:58,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:01:58,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:58,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:01:58,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:01:58,517 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:01:58,517 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:01:58,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:01:58,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:01:58,518 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:01:58,518 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:01:58,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:01:58,518 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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62eecaab9c99f0fa1c059eddca8c27b38035ebb18e1472cebfbee2848ace27b1 [2023-11-25 00:01:58,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:01:58,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:01:58,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:01:58,861 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:01:58,862 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:01:58,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c [2023-11-25 00:02:02,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:03,177 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:03,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c [2023-11-25 00:02:03,234 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/data/827015c92/557e077c6b0d4121937c2128603bae2c/FLAGf9871f39a [2023-11-25 00:02:03,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/data/827015c92/557e077c6b0d4121937c2128603bae2c [2023-11-25 00:02:03,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:03,261 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:03,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:03,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:03,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:03,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:03" (1/1) ... [2023-11-25 00:02:03,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ffce0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:03, skipping insertion in model container [2023-11-25 00:02:03,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:03" (1/1) ... [2023-11-25 00:02:03,612 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:06,067 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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c[375709,375722] [2023-11-25 00:02:06,111 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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c[383339,383352] [2023-11-25 00:02:06,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:06,377 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:07,698 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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c[375709,375722] [2023-11-25 00:02:07,709 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_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.04.cil-1.c[383339,383352] [2023-11-25 00:02:07,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:07,804 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:07,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07 WrapperNode [2023-11-25 00:02:07,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:07,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:07,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:07,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:07,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:07,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:08,482 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12748 [2023-11-25 00:02:08,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:08,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:08,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:08,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:08,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:08,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:08,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:08,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:08,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:09,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:09,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:09,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:09,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:09,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:09,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:09,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:09,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (1/1) ... [2023-11-25 00:02:09,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:09,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:09,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-25 00:02:09,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-25 00:02:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-25 00:02:09,415 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-25 00:02:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-25 00:02:09,415 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-25 00:02:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-25 00:02:09,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-25 00:02:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-25 00:02:09,416 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-25 00:02:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-25 00:02:09,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-25 00:02:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:09,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:09,572 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:09,574 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:19,465 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:21,834 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:21,834 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-25 00:02:21,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:21 BoogieIcfgContainer [2023-11-25 00:02:21,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:21,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:21,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:21,848 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:21,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:03" (1/3) ... [2023-11-25 00:02:21,849 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcb2ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:21, skipping insertion in model container [2023-11-25 00:02:21,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:07" (2/3) ... [2023-11-25 00:02:21,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcb2ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:21, skipping insertion in model container [2023-11-25 00:02:21,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:21" (3/3) ... [2023-11-25 00:02:21,851 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.04.cil-1.c [2023-11-25 00:02:21,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:21,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:02:21,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:21,982 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;@7158a632, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:21,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:02:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1721 states have (on average 1.9697850087158628) internal successors, (3390), 1724 states have internal predecessors, (3390), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-25 00:02:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-25 00:02:22,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:22,011 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] [2023-11-25 00:02:22,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:22,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2107614947, now seen corresponding path program 1 times [2023-11-25 00:02:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:22,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467803966] [2023-11-25 00:02:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:22,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:22,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467803966] [2023-11-25 00:02:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467803966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:22,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:22,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:22,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876243914] [2023-11-25 00:02:22,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:22,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:02:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:02:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:02:22,658 INFO L87 Difference]: Start difference. First operand has 1748 states, 1721 states have (on average 1.9697850087158628) internal successors, (3390), 1724 states have internal predecessors, (3390), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-11-25 00:02:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:23,847 INFO L93 Difference]: Finished difference Result 3584 states and 6994 transitions. [2023-11-25 00:02:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:02:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 43 [2023-11-25 00:02:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:23,872 INFO L225 Difference]: With dead ends: 3584 [2023-11-25 00:02:23,872 INFO L226 Difference]: Without dead ends: 1835 [2023-11-25 00:02:23,880 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 [2023-11-25 00:02:23,884 INFO L413 NwaCegarLoop]: 3281 mSDtfsCounter, 3525 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:23,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 6496 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:02:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2023-11-25 00:02:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1834. [2023-11-25 00:02:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1788 states have (on average 1.9429530201342282) internal successors, (3474), 1791 states have internal predecessors, (3474), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-25 00:02:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 3538 transitions. [2023-11-25 00:02:24,015 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 3538 transitions. Word has length 43 [2023-11-25 00:02:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:24,015 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 3538 transitions. [2023-11-25 00:02:24,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-11-25 00:02:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 3538 transitions. [2023-11-25 00:02:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-25 00:02:24,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:24,022 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, 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 00:02:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:24,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:24,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1340805022, now seen corresponding path program 1 times [2023-11-25 00:02:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768607500] [2023-11-25 00:02:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:02:24,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768607500] [2023-11-25 00:02:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768607500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295567478] [2023-11-25 00:02:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:24,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:24,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:24,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:24,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:24,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:24,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-25 00:02:24,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:24,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295567478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:24,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:24,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:02:24,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979839023] [2023-11-25 00:02:24,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:24,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:24,560 INFO L87 Difference]: Start difference. First operand 1834 states and 3538 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 00:02:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:25,105 INFO L93 Difference]: Finished difference Result 2203 states and 4065 transitions. [2023-11-25 00:02:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 81 [2023-11-25 00:02:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:25,123 INFO L225 Difference]: With dead ends: 2203 [2023-11-25 00:02:25,123 INFO L226 Difference]: Without dead ends: 2015 [2023-11-25 00:02:25,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 00:02:25,127 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 3386 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 3321 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:25,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3321 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:02:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2023-11-25 00:02:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 2011. [2023-11-25 00:02:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 1927 states have (on average 1.9019200830306175) internal successors, (3665), 1931 states have internal predecessors, (3665), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-25 00:02:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 3781 transitions. [2023-11-25 00:02:25,207 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 3781 transitions. Word has length 81 [2023-11-25 00:02:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:25,208 INFO L495 AbstractCegarLoop]: Abstraction has 2011 states and 3781 transitions. [2023-11-25 00:02:25,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 00:02:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 3781 transitions. [2023-11-25 00:02:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-25 00:02:25,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:25,212 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, 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 00:02:25,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:25,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:25,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:25,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash -620711870, now seen corresponding path program 1 times [2023-11-25 00:02:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554518271] [2023-11-25 00:02:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:02:25,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554518271] [2023-11-25 00:02:25,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554518271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147639674] [2023-11-25 00:02:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:25,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:25,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:25,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:25,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:02:25,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:25,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147639674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:25,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:25,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:02:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231299046] [2023-11-25 00:02:25,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:25,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:25,810 INFO L87 Difference]: Start difference. First operand 2011 states and 3781 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 00:02:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:26,374 INFO L93 Difference]: Finished difference Result 2728 states and 4796 transitions. [2023-11-25 00:02:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 81 [2023-11-25 00:02:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:26,392 INFO L225 Difference]: With dead ends: 2728 [2023-11-25 00:02:26,392 INFO L226 Difference]: Without dead ends: 2363 [2023-11-25 00:02:26,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 00:02:26,396 INFO L413 NwaCegarLoop]: 3209 mSDtfsCounter, 3389 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:26,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3319 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-11-25 00:02:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2357. [2023-11-25 00:02:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2199 states have (on average 1.834924965893588) internal successors, (4035), 2205 states have internal predecessors, (4035), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-25 00:02:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 4251 transitions. [2023-11-25 00:02:26,525 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 4251 transitions. Word has length 81 [2023-11-25 00:02:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:26,525 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 4251 transitions. [2023-11-25 00:02:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 00:02:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 4251 transitions. [2023-11-25 00:02:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-25 00:02:26,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:26,529 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, 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 00:02:26,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:26,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:26,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:26,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1687264158, now seen corresponding path program 1 times [2023-11-25 00:02:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:26,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788500140] [2023-11-25 00:02:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:02:26,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788500140] [2023-11-25 00:02:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788500140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:26,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:26,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145755732] [2023-11-25 00:02:26,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:02:26,867 INFO L87 Difference]: Start difference. First operand 2357 states and 4251 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 00:02:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:27,518 INFO L93 Difference]: Finished difference Result 2919 states and 5040 transitions. [2023-11-25 00:02:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 81 [2023-11-25 00:02:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:27,538 INFO L225 Difference]: With dead ends: 2919 [2023-11-25 00:02:27,538 INFO L226 Difference]: Without dead ends: 2553 [2023-11-25 00:02:27,541 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 00:02:27,542 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 59 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6417 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:27,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6417 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2023-11-25 00:02:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2481. [2023-11-25 00:02:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2315 states have (on average 1.8207343412526997) internal successors, (4215), 2321 states have internal predecessors, (4215), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-25 00:02:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4439 transitions. [2023-11-25 00:02:27,652 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4439 transitions. Word has length 81 [2023-11-25 00:02:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:27,653 INFO L495 AbstractCegarLoop]: Abstraction has 2481 states and 4439 transitions. [2023-11-25 00:02:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 00:02:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4439 transitions. [2023-11-25 00:02:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-25 00:02:27,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:27,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:02:27,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:02:27,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 677030055, now seen corresponding path program 1 times [2023-11-25 00:02:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792997409] [2023-11-25 00:02:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-25 00:02:27,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792997409] [2023-11-25 00:02:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792997409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:27,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705846605] [2023-11-25 00:02:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:27,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:02:27,768 INFO L87 Difference]: Start difference. First operand 2481 states and 4439 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 00:02:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:28,335 INFO L93 Difference]: Finished difference Result 4114 states and 6748 transitions. [2023-11-25 00:02:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 108 [2023-11-25 00:02:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:28,361 INFO L225 Difference]: With dead ends: 4114 [2023-11-25 00:02:28,361 INFO L226 Difference]: Without dead ends: 3279 [2023-11-25 00:02:28,366 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 00:02:28,367 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3379 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3379 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:28,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 3291 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:02:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2023-11-25 00:02:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3265. [2023-11-25 00:02:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 2947 states have (on average 1.7234475738038684) internal successors, (5079), 2957 states have internal predecessors, (5079), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-25 00:02:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 5503 transitions. [2023-11-25 00:02:28,553 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 5503 transitions. Word has length 108 [2023-11-25 00:02:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:28,554 INFO L495 AbstractCegarLoop]: Abstraction has 3265 states and 5503 transitions. [2023-11-25 00:02:28,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 00:02:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 5503 transitions. [2023-11-25 00:02:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-25 00:02:28,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:28,563 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:02:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:02:28,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -224105317, now seen corresponding path program 1 times [2023-11-25 00:02:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569259691] [2023-11-25 00:02:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-25 00:02:28,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569259691] [2023-11-25 00:02:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569259691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:28,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555063003] [2023-11-25 00:02:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:02:28,663 INFO L87 Difference]: Start difference. First operand 3265 states and 5503 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 00:02:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:29,263 INFO L93 Difference]: Finished difference Result 6430 states and 9916 transitions. [2023-11-25 00:02:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 108 [2023-11-25 00:02:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:29,294 INFO L225 Difference]: With dead ends: 6430 [2023-11-25 00:02:29,294 INFO L226 Difference]: Without dead ends: 4811 [2023-11-25 00:02:29,302 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 00:02:29,305 INFO L413 NwaCegarLoop]: 3179 mSDtfsCounter, 3382 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:29,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 3289 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:02:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2023-11-25 00:02:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4785. [2023-11-25 00:02:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4171 states have (on average 1.6128026852073842) internal successors, (6727), 4189 states have internal predecessors, (6727), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-25 00:02:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 7535 transitions. [2023-11-25 00:02:29,714 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 7535 transitions. Word has length 108 [2023-11-25 00:02:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:29,715 INFO L495 AbstractCegarLoop]: Abstraction has 4785 states and 7535 transitions. [2023-11-25 00:02:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 00:02:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 7535 transitions. [2023-11-25 00:02:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:02:29,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:29,729 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-25 00:02:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:02:29,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:29,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -915297914, now seen corresponding path program 1 times [2023-11-25 00:02:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:29,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084021527] [2023-11-25 00:02:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:29,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:02:29,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084021527] [2023-11-25 00:02:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084021527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485533021] [2023-11-25 00:02:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:29,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:29,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:02:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:30,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:30,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:30,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485533021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:02:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427975650] [2023-11-25 00:02:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:30,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:30,122 INFO L87 Difference]: Start difference. First operand 4785 states and 7535 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:30,811 INFO L93 Difference]: Finished difference Result 7453 states and 11241 transitions. [2023-11-25 00:02:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-11-25 00:02:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:30,848 INFO L225 Difference]: With dead ends: 7453 [2023-11-25 00:02:30,848 INFO L226 Difference]: Without dead ends: 5847 [2023-11-25 00:02:30,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:30,856 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 72 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 6417 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:30,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 6417 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2023-11-25 00:02:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5405. [2023-11-25 00:02:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4743 states have (on average 1.5987771452667088) internal successors, (7583), 4761 states have internal predecessors, (7583), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2023-11-25 00:02:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8439 transitions. [2023-11-25 00:02:31,139 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8439 transitions. Word has length 123 [2023-11-25 00:02:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:31,140 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 8439 transitions. [2023-11-25 00:02:31,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8439 transitions. [2023-11-25 00:02:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:02:31,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:31,157 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-25 00:02:31,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:31,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:31,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 974678661, now seen corresponding path program 1 times [2023-11-25 00:02:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098383075] [2023-11-25 00:02:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:02:31,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098383075] [2023-11-25 00:02:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098383075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:31,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152629153] [2023-11-25 00:02:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:31,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:31,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:02:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:31,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:31,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:31,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152629153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:31,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:31,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:02:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135830685] [2023-11-25 00:02:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:31,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:31,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:31,764 INFO L87 Difference]: Start difference. First operand 5405 states and 8439 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:32,484 INFO L93 Difference]: Finished difference Result 8713 states and 13061 transitions. [2023-11-25 00:02:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-11-25 00:02:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:32,532 INFO L225 Difference]: With dead ends: 8713 [2023-11-25 00:02:32,532 INFO L226 Difference]: Without dead ends: 6791 [2023-11-25 00:02:32,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:32,541 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 78 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:32,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6436 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2023-11-25 00:02:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 6293. [2023-11-25 00:02:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5559 states have (on average 1.579960424536787) internal successors, (8783), 5577 states have internal predecessors, (8783), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-25 00:02:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9711 transitions. [2023-11-25 00:02:32,872 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9711 transitions. Word has length 123 [2023-11-25 00:02:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:32,872 INFO L495 AbstractCegarLoop]: Abstraction has 6293 states and 9711 transitions. [2023-11-25 00:02:32,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9711 transitions. [2023-11-25 00:02:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:02:32,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:32,891 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, 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] [2023-11-25 00:02:32,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:33,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:33,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:33,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1589525061, now seen corresponding path program 1 times [2023-11-25 00:02:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122431790] [2023-11-25 00:02:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-25 00:02:33,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122431790] [2023-11-25 00:02:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122431790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329777581] [2023-11-25 00:02:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:33,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:33,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:33,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:33,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:02:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:33,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:33,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:33,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329777581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:33,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:02:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059680879] [2023-11-25 00:02:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:33,474 INFO L87 Difference]: Start difference. First operand 6293 states and 9711 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:34,320 INFO L93 Difference]: Finished difference Result 10545 states and 15695 transitions. [2023-11-25 00:02:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-11-25 00:02:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:34,355 INFO L225 Difference]: With dead ends: 10545 [2023-11-25 00:02:34,355 INFO L226 Difference]: Without dead ends: 8143 [2023-11-25 00:02:34,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:34,366 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 84 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:34,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6441 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2023-11-25 00:02:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 7589. [2023-11-25 00:02:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 6747 states have (on average 1.5578775752186156) internal successors, (10511), 6765 states have internal predecessors, (10511), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2023-11-25 00:02:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 11547 transitions. [2023-11-25 00:02:34,705 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 11547 transitions. Word has length 123 [2023-11-25 00:02:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:34,705 INFO L495 AbstractCegarLoop]: Abstraction has 7589 states and 11547 transitions. [2023-11-25 00:02:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 11547 transitions. [2023-11-25 00:02:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:02:34,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:34,724 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, 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] [2023-11-25 00:02:34,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:34,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:34,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1475657392, now seen corresponding path program 1 times [2023-11-25 00:02:34,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:34,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625961844] [2023-11-25 00:02:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:34,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-25 00:02:35,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625961844] [2023-11-25 00:02:35,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625961844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:35,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750293767] [2023-11-25 00:02:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:35,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:35,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:35,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:35,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:02:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:35,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:02:35,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:35,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750293767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:35,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:35,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:02:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098869485] [2023-11-25 00:02:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:35,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:35,366 INFO L87 Difference]: Start difference. First operand 7589 states and 11547 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:36,123 INFO L93 Difference]: Finished difference Result 12915 states and 19070 transitions. [2023-11-25 00:02:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-11-25 00:02:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:36,161 INFO L225 Difference]: With dead ends: 12915 [2023-11-25 00:02:36,162 INFO L226 Difference]: Without dead ends: 9838 [2023-11-25 00:02:36,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:36,173 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 66 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:36,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6426 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9838 states. [2023-11-25 00:02:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9838 to 9452. [2023-11-25 00:02:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9452 states, 8448 states have (on average 1.531841856060606) internal successors, (12941), 8466 states have internal predecessors, (12941), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2023-11-25 00:02:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9452 states to 9452 states and 14139 transitions. [2023-11-25 00:02:36,555 INFO L78 Accepts]: Start accepts. Automaton has 9452 states and 14139 transitions. Word has length 123 [2023-11-25 00:02:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:36,556 INFO L495 AbstractCegarLoop]: Abstraction has 9452 states and 14139 transitions. [2023-11-25 00:02:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:02:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9452 states and 14139 transitions. [2023-11-25 00:02:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:02:36,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:36,579 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-25 00:02:36,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-25 00:02:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:02:36,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:36,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1743641703, now seen corresponding path program 2 times [2023-11-25 00:02:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:36,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408598592] [2023-11-25 00:02:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-25 00:02:37,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408598592] [2023-11-25 00:02:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408598592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863711393] [2023-11-25 00:02:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:37,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:37,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0d4a708-4f9e-4f74-a3fc-d9a2cd0405a0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:02:37,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-25 00:02:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:37,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:02:37,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-25 00:02:37,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-25 00:02:38,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863711393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:38,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278802574] [2023-11-25 00:02:38,059 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2023-11-25 00:02:38,059 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:38,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:38,071 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:38,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs