./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/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 9e8eec1743df688e821561fda517f1945d9b8e3e5029879578d4191f60280f1b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:04,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:05,014 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:56:05,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:05,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:05,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:05,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:05,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:05,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:05,092 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:05,092 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:05,093 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:05,093 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:05,096 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:05,096 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:05,097 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:05,098 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:05,098 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:05,099 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:05,099 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:05,100 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:05,101 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:05,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:05,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:05,103 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:05,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:05,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:05,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:05,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:05,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:05,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:05,108 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:05,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:05,108 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:05,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:05,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:05,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:05,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:05,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:05,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:05,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:05,111 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:05,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:05,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:05,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:05,113 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:05,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:05,113 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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e8eec1743df688e821561fda517f1945d9b8e3e5029879578d4191f60280f1b [2023-11-24 23:56:05,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:05,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:05,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:05,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:05,516 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:05,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c [2023-11-24 23:56:09,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:10,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:10,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c [2023-11-24 23:56:10,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/data/369e2a3b4/0881e3849aff4c2c8117d6c89bfc8e1e/FLAG04e510f97 [2023-11-24 23:56:10,115 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/data/369e2a3b4/0881e3849aff4c2c8117d6c89bfc8e1e [2023-11-24 23:56:10,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:10,127 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:10,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:10,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:10,145 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:10,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:10,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d56ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10, skipping insertion in model container [2023-11-24 23:56:10,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:10,571 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:13,371 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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[378560,378573] [2023-11-24 23:56:13,411 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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[383339,383352] [2023-11-24 23:56:13,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:13,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:15,268 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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[378560,378573] [2023-11-24 23:56:15,277 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_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[383339,383352] [2023-11-24 23:56:15,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:15,382 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:15,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15 WrapperNode [2023-11-24 23:56:15,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:15,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:15,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:15,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:15,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:15,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:15,929 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12748 [2023-11-24 23:56:15,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:15,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:15,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:15,931 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:15,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:15,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:16,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:16,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:16,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:16,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (1/1) ... [2023-11-24 23:56:16,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:16,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:16,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:16,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:56:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:56:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:56:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:56:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:56:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:56:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:56:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:56:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:56:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:56:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:56:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:56:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:16,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:17,067 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:17,073 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:28,656 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:31,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:31,652 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-24 23:56:31,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:31 BoogieIcfgContainer [2023-11-24 23:56:31,655 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:31,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:31,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:31,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:31,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:10" (1/3) ... [2023-11-24 23:56:31,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fa9121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:31, skipping insertion in model container [2023-11-24 23:56:31,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:15" (2/3) ... [2023-11-24 23:56:31,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fa9121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:31, skipping insertion in model container [2023-11-24 23:56:31,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:31" (3/3) ... [2023-11-24 23:56:31,670 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.04.cil-1.c [2023-11-24 23:56:31,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:31,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:56:31,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:31,847 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;@4441374e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:31,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:56:31,862 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) [2023-11-24 23:56:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 23:56:31,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:31,878 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] [2023-11-24 23:56:31,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:31,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -884880667, now seen corresponding path program 1 times [2023-11-24 23:56:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:31,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160301310] [2023-11-24 23:56:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:32,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160301310] [2023-11-24 23:56:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160301310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:32,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:32,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:32,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219884515] [2023-11-24 23:56:32,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:32,419 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) [2023-11-24 23:56:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:33,538 INFO L93 Difference]: Finished difference Result 3584 states and 6994 transitions. [2023-11-24 23:56:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:56:33,541 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 [2023-11-24 23:56:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:33,578 INFO L225 Difference]: With dead ends: 3584 [2023-11-24 23:56:33,579 INFO L226 Difference]: Without dead ends: 1835 [2023-11-24 23:56:33,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:33,597 INFO L413 NwaCegarLoop]: 3281 mSDtfsCounter, 3525 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 6496 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2023-11-24 23:56:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1834. [2023-11-24 23:56:33,789 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) [2023-11-24 23:56:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 3538 transitions. [2023-11-24 23:56:33,807 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 3538 transitions. Word has length 43 [2023-11-24 23:56:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:33,807 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 3538 transitions. [2023-11-24 23:56:33,808 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) [2023-11-24 23:56:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 3538 transitions. [2023-11-24 23:56:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 23:56:33,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:33,815 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] [2023-11-24 23:56:33,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:56:33,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:33,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash 672008516, now seen corresponding path program 1 times [2023-11-24 23:56:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849892125] [2023-11-24 23:56:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:33,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:56:34,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849892125] [2023-11-24 23:56:34,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849892125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765471088] [2023-11-24 23:56:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:34,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:34,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:56:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:34,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:34,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 23:56:34,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765471088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:56:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981247663] [2023-11-24 23:56:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:34,522 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) [2023-11-24 23:56:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:35,161 INFO L93 Difference]: Finished difference Result 2203 states and 4065 transitions. [2023-11-24 23:56:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:35,162 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 [2023-11-24 23:56:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:35,181 INFO L225 Difference]: With dead ends: 2203 [2023-11-24 23:56:35,182 INFO L226 Difference]: Without dead ends: 2015 [2023-11-24 23:56:35,184 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 [2023-11-24 23:56:35,186 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:35,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3321 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2023-11-24 23:56:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 2011. [2023-11-24 23:56:35,278 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) [2023-11-24 23:56:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 3781 transitions. [2023-11-24 23:56:35,295 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 3781 transitions. Word has length 81 [2023-11-24 23:56:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:35,296 INFO L495 AbstractCegarLoop]: Abstraction has 2011 states and 3781 transitions. [2023-11-24 23:56:35,296 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) [2023-11-24 23:56:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 3781 transitions. [2023-11-24 23:56:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 23:56:35,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:35,301 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] [2023-11-24 23:56:35,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:35,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1392101668, now seen corresponding path program 1 times [2023-11-24 23:56:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763554242] [2023-11-24 23:56:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:56:35,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763554242] [2023-11-24 23:56:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763554242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:35,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655455564] [2023-11-24 23:56:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:35,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:35,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:35,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:56:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:36,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:36,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:56:36,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:36,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655455564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:56:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900104276] [2023-11-24 23:56:36,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:36,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:36,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:36,056 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) [2023-11-24 23:56:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:36,677 INFO L93 Difference]: Finished difference Result 2728 states and 4796 transitions. [2023-11-24 23:56:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:36,678 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 [2023-11-24 23:56:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:36,698 INFO L225 Difference]: With dead ends: 2728 [2023-11-24 23:56:36,698 INFO L226 Difference]: Without dead ends: 2363 [2023-11-24 23:56:36,701 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 [2023-11-24 23:56:36,703 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 [2023-11-24 23:56:36,703 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] [2023-11-24 23:56:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-11-24 23:56:36,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2357. [2023-11-24 23:56:36,793 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) [2023-11-24 23:56:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 4251 transitions. [2023-11-24 23:56:36,809 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 4251 transitions. Word has length 81 [2023-11-24 23:56:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:36,810 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 4251 transitions. [2023-11-24 23:56:36,810 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) [2023-11-24 23:56:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 4251 transitions. [2023-11-24 23:56:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 23:56:36,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:36,814 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] [2023-11-24 23:56:36,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:37,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 23:56:37,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:37,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 325549380, now seen corresponding path program 1 times [2023-11-24 23:56:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272452932] [2023-11-24 23:56:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:37,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-24 23:56:37,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:37,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272452932] [2023-11-24 23:56:37,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272452932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:37,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:56:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6594760] [2023-11-24 23:56:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:37,142 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) [2023-11-24 23:56:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:37,850 INFO L93 Difference]: Finished difference Result 2919 states and 5040 transitions. [2023-11-24 23:56:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:37,851 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 [2023-11-24 23:56:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:37,873 INFO L225 Difference]: With dead ends: 2919 [2023-11-24 23:56:37,873 INFO L226 Difference]: Without dead ends: 2553 [2023-11-24 23:56:37,877 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 [2023-11-24 23:56:37,880 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 [2023-11-24 23:56:37,883 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] [2023-11-24 23:56:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2023-11-24 23:56:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2481. [2023-11-24 23:56:38,008 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) [2023-11-24 23:56:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4439 transitions. [2023-11-24 23:56:38,027 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4439 transitions. Word has length 81 [2023-11-24 23:56:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:38,028 INFO L495 AbstractCegarLoop]: Abstraction has 2481 states and 4439 transitions. [2023-11-24 23:56:38,029 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) [2023-11-24 23:56:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4439 transitions. [2023-11-24 23:56:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 23:56:38,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:38,038 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] [2023-11-24 23:56:38,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:56:38,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -419251641, now seen corresponding path program 1 times [2023-11-24 23:56:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:38,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219753450] [2023-11-24 23:56:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:38,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 23:56:38,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219753450] [2023-11-24 23:56:38,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219753450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:38,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:38,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:56:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744310869] [2023-11-24 23:56:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:38,193 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) [2023-11-24 23:56:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:38,817 INFO L93 Difference]: Finished difference Result 4114 states and 6748 transitions. [2023-11-24 23:56:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:38,818 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 [2023-11-24 23:56:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:38,845 INFO L225 Difference]: With dead ends: 4114 [2023-11-24 23:56:38,845 INFO L226 Difference]: Without dead ends: 3279 [2023-11-24 23:56:38,850 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 [2023-11-24 23:56:38,851 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3379 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:38,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 3291 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2023-11-24 23:56:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3265. [2023-11-24 23:56:39,002 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) [2023-11-24 23:56:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 5503 transitions. [2023-11-24 23:56:39,029 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 5503 transitions. Word has length 108 [2023-11-24 23:56:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:39,030 INFO L495 AbstractCegarLoop]: Abstraction has 3265 states and 5503 transitions. [2023-11-24 23:56:39,030 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) [2023-11-24 23:56:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 5503 transitions. [2023-11-24 23:56:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 23:56:39,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:39,040 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] [2023-11-24 23:56:39,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:56:39,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:39,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1916220285, now seen corresponding path program 1 times [2023-11-24 23:56:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:39,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136921642] [2023-11-24 23:56:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:39,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 23:56:39,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:39,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136921642] [2023-11-24 23:56:39,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136921642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:39,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:39,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:56:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210033996] [2023-11-24 23:56:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:39,161 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) [2023-11-24 23:56:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:39,911 INFO L93 Difference]: Finished difference Result 6430 states and 9916 transitions. [2023-11-24 23:56:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:39,913 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 [2023-11-24 23:56:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:39,954 INFO L225 Difference]: With dead ends: 6430 [2023-11-24 23:56:39,954 INFO L226 Difference]: Without dead ends: 4811 [2023-11-24 23:56:39,963 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 [2023-11-24 23:56:39,964 INFO L413 NwaCegarLoop]: 3179 mSDtfsCounter, 3382 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:39,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 3289 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2023-11-24 23:56:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4785. [2023-11-24 23:56:40,211 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) [2023-11-24 23:56:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 7535 transitions. [2023-11-24 23:56:40,240 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 7535 transitions. Word has length 108 [2023-11-24 23:56:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:40,241 INFO L495 AbstractCegarLoop]: Abstraction has 4785 states and 7535 transitions. [2023-11-24 23:56:40,241 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) [2023-11-24 23:56:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 7535 transitions. [2023-11-24 23:56:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:56:40,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:40,258 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] [2023-11-24 23:56:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:56:40,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:40,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -238962938, now seen corresponding path program 1 times [2023-11-24 23:56:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793585535] [2023-11-24 23:56:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-24 23:56:40,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793585535] [2023-11-24 23:56:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793585535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728911165] [2023-11-24 23:56:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:40,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:56:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:40,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:40,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:56:40,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:40,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728911165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:40,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:40,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-24 23:56:40,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671299978] [2023-11-24 23:56:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:40,777 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) [2023-11-24 23:56:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:41,810 INFO L93 Difference]: Finished difference Result 7453 states and 11241 transitions. [2023-11-24 23:56:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:41,811 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 [2023-11-24 23:56:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:41,891 INFO L225 Difference]: With dead ends: 7453 [2023-11-24 23:56:41,891 INFO L226 Difference]: Without dead ends: 5847 [2023-11-24 23:56:41,898 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 [2023-11-24 23:56:41,900 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 72 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:41,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 6417 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2023-11-24 23:56:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5405. [2023-11-24 23:56:42,230 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) [2023-11-24 23:56:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8439 transitions. [2023-11-24 23:56:42,270 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8439 transitions. Word has length 123 [2023-11-24 23:56:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:42,272 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 8439 transitions. [2023-11-24 23:56:42,273 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) [2023-11-24 23:56:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8439 transitions. [2023-11-24 23:56:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:56:42,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:42,295 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] [2023-11-24 23:56:42,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:42,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 23:56:42,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:42,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1926447893, now seen corresponding path program 1 times [2023-11-24 23:56:42,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:42,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312357690] [2023-11-24 23:56:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:42,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-24 23:56:42,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312357690] [2023-11-24 23:56:42,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312357690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:42,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998203733] [2023-11-24 23:56:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:42,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:42,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:56:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:42,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:42,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:56:42,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998203733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:42,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:42,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-24 23:56:42,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841459014] [2023-11-24 23:56:42,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:42,990 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) [2023-11-24 23:56:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:44,012 INFO L93 Difference]: Finished difference Result 8713 states and 13061 transitions. [2023-11-24 23:56:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:44,013 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 [2023-11-24 23:56:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:44,047 INFO L225 Difference]: With dead ends: 8713 [2023-11-24 23:56:44,047 INFO L226 Difference]: Without dead ends: 6791 [2023-11-24 23:56:44,057 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 [2023-11-24 23:56:44,059 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 78 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:44,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6436 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:56:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2023-11-24 23:56:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 6293. [2023-11-24 23:56:44,510 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) [2023-11-24 23:56:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9711 transitions. [2023-11-24 23:56:44,547 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9711 transitions. Word has length 123 [2023-11-24 23:56:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:44,548 INFO L495 AbstractCegarLoop]: Abstraction has 6293 states and 9711 transitions. [2023-11-24 23:56:44,549 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) [2023-11-24 23:56:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9711 transitions. [2023-11-24 23:56:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:56:44,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:44,572 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] [2023-11-24 23:56:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:44,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:56:44,779 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:44,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1093815049, now seen corresponding path program 1 times [2023-11-24 23:56:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165673125] [2023-11-24 23:56:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-24 23:56:44,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165673125] [2023-11-24 23:56:44,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165673125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:44,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586197232] [2023-11-24 23:56:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:44,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:44,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:45,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:56:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:45,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:45,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:56:45,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586197232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:45,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-24 23:56:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871647655] [2023-11-24 23:56:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:45,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:45,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:45,264 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) [2023-11-24 23:56:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:46,241 INFO L93 Difference]: Finished difference Result 10545 states and 15695 transitions. [2023-11-24 23:56:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:46,242 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 [2023-11-24 23:56:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:46,268 INFO L225 Difference]: With dead ends: 10545 [2023-11-24 23:56:46,269 INFO L226 Difference]: Without dead ends: 8143 [2023-11-24 23:56:46,275 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 [2023-11-24 23:56:46,277 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:46,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6441 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:56:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2023-11-24 23:56:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 7589. [2023-11-24 23:56:46,578 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) [2023-11-24 23:56:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 11547 transitions. [2023-11-24 23:56:46,602 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 11547 transitions. Word has length 123 [2023-11-24 23:56:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:46,602 INFO L495 AbstractCegarLoop]: Abstraction has 7589 states and 11547 transitions. [2023-11-24 23:56:46,603 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) [2023-11-24 23:56:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 11547 transitions. [2023-11-24 23:56:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:56:46,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:46,621 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] [2023-11-24 23:56:46,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:56:46,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1384150102, now seen corresponding path program 1 times [2023-11-24 23:56:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116633619] [2023-11-24 23:56:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-24 23:56:47,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116633619] [2023-11-24 23:56:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116633619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724075489] [2023-11-24 23:56:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:47,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:47,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:47,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:56:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:47,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:56:47,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:56:47,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:47,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724075489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:47,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:47,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-24 23:56:47,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530345798] [2023-11-24 23:56:47,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:47,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:47,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:47,260 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) [2023-11-24 23:56:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:48,093 INFO L93 Difference]: Finished difference Result 12915 states and 19070 transitions. [2023-11-24 23:56:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:48,094 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 [2023-11-24 23:56:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:48,128 INFO L225 Difference]: With dead ends: 12915 [2023-11-24 23:56:48,128 INFO L226 Difference]: Without dead ends: 9838 [2023-11-24 23:56:48,139 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 [2023-11-24 23:56:48,140 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 66 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2023-11-24 23:56:48,141 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] [2023-11-24 23:56:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9838 states. [2023-11-24 23:56:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9838 to 9452. [2023-11-24 23:56:48,639 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) [2023-11-24 23:56:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9452 states to 9452 states and 14139 transitions. [2023-11-24 23:56:48,669 INFO L78 Accepts]: Start accepts. Automaton has 9452 states and 14139 transitions. Word has length 123 [2023-11-24 23:56:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:48,670 INFO L495 AbstractCegarLoop]: Abstraction has 9452 states and 14139 transitions. [2023-11-24 23:56:48,670 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) [2023-11-24 23:56:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9452 states and 14139 transitions. [2023-11-24 23:56:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:56:48,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:48,696 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] [2023-11-24 23:56:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aebc8d9-e8ed-4400-8a1b-c188d5da4524/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:56:48,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:48,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1641308361, now seen corresponding path program 2 times [2023-11-24 23:56:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:48,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932569082] [2023-11-24 23:56:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:48,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat