./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje --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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:35:18,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:35:18,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:35:18,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:35:18,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:35:18,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:35:18,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:35:18,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:35:18,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:35:18,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:35:18,865 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:35:18,866 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:35:18,866 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:35:18,867 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:35:18,867 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:35:18,867 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:35:18,868 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:35:18,868 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:35:18,869 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:35:18,869 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:35:18,870 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:35:18,870 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:35:18,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:35:18,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:35:18,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:35:18,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:35:18,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:35:18,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:35:18,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:35:18,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:35:18,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:35:18,874 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:35:18,875 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:35:18,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:35:18,875 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:35:18,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:35:18,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:35:18,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:35:18,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:18,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:35:18,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:35:18,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:35:18,880 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:35:18,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:35:18,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:35:18,881 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:35:18,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:35:18,882 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_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2024-11-09 06:35:19,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:35:19,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:35:19,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:35:19,197 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:35:19,198 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:35:19,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c Unable to find full path for "g++" [2024-11-09 06:35:21,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:35:21,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:35:21,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-11-09 06:35:21,401 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/data/45f59029f/bad5462644a74550a192eefeb7eb2631/FLAG0e89eb2e9 [2024-11-09 06:35:21,416 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/data/45f59029f/bad5462644a74550a192eefeb7eb2631 [2024-11-09 06:35:21,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:35:21,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:35:21,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:21,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:35:21,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:35:21,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549a76b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21, skipping insertion in model container [2024-11-09 06:35:21,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,458 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:35:21,632 WARN L250 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_f1d92b02-2daa-454f-9317-4194e57a3bf3/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-11-09 06:35:21,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:21,667 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:35:21,680 WARN L250 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_f1d92b02-2daa-454f-9317-4194e57a3bf3/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-11-09 06:35:21,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:21,709 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:35:21,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21 WrapperNode [2024-11-09 06:35:21,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:21,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:21,711 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:35:21,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:35:21,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,758 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-11-09 06:35:21,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:21,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:35:21,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:35:21,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:35:21,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,771 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,772 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:35:21,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:35:21,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:35:21,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:35:21,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (1/1) ... [2024-11-09 06:35:21,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:21,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:35:21,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:35:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:35:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 06:35:21,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 06:35:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:35:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:35:21,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:35:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:35:21,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:35:21,910 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:35:21,912 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:35:22,104 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 06:35:22,104 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:35:22,137 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:35:22,137 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 06:35:22,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:22 BoogieIcfgContainer [2024-11-09 06:35:22,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:35:22,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:35:22,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:35:22,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:35:22,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:35:21" (1/3) ... [2024-11-09 06:35:22,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1fa2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:22, skipping insertion in model container [2024-11-09 06:35:22,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:21" (2/3) ... [2024-11-09 06:35:22,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1fa2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:22, skipping insertion in model container [2024-11-09 06:35:22,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:22" (3/3) ... [2024-11-09 06:35:22,147 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-11-09 06:35:22,165 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:35:22,166 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:35:22,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:35:22,238 INFO L333 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, 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;@2d2ebfbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:35:22,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:35:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:35:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:35:22,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:22,250 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:22,251 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:22,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1666051132, now seen corresponding path program 1 times [2024-11-09 06:35:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:22,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834661855] [2024-11-09 06:35:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 06:35:22,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:22,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834661855] [2024-11-09 06:35:22,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834661855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:22,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:22,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:35:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442591769] [2024-11-09 06:35:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:22,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 06:35:22,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 06:35:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:35:22,596 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 06:35:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:22,645 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2024-11-09 06:35:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 06:35:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2024-11-09 06:35:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:22,657 INFO L225 Difference]: With dead ends: 49 [2024-11-09 06:35:22,657 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:35:22,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:35:22,667 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:22,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:35:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 06:35:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 06:35:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2024-11-09 06:35:22,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2024-11-09 06:35:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:22,720 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2024-11-09 06:35:22,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 06:35:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2024-11-09 06:35:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 06:35:22,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:22,724 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:22,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:35:22,724 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:22,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1875264981, now seen corresponding path program 1 times [2024-11-09 06:35:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164844010] [2024-11-09 06:35:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:35:23,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164844010] [2024-11-09 06:35:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164844010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546939729] [2024-11-09 06:35:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:23,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:23,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:35:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:23,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 06:35:23,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:35:23,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:35:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546939729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749978756] [2024-11-09 06:35:23,323 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 06:35:23,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:23,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:23,332 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:23,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:24,527 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:35:24,530 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:25,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1749978756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:25,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:25,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5, 5] total 14 [2024-11-09 06:35:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403535893] [2024-11-09 06:35:25,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:25,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 06:35:25,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 06:35:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:35:25,220 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 06:35:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:25,503 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2024-11-09 06:35:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:35:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2024-11-09 06:35:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:25,505 INFO L225 Difference]: With dead ends: 46 [2024-11-09 06:35:25,505 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 06:35:25,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:35:25,507 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:25,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:35:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 06:35:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2024-11-09 06:35:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 06:35:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-09 06:35:25,524 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2024-11-09 06:35:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:25,525 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-09 06:35:25,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 06:35:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-09 06:35:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:35:25,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:25,528 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:25,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:35:25,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:25,729 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:25,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1995645418, now seen corresponding path program 1 times [2024-11-09 06:35:25,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:25,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893139917] [2024-11-09 06:35:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:25,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610341944] [2024-11-09 06:35:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:25,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:25,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:35:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:25,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:35:25,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 06:35:25,852 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:25,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:25,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893139917] [2024-11-09 06:35:25,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610341944] [2024-11-09 06:35:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610341944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:25,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:25,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:35:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394395420] [2024-11-09 06:35:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:25,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:25,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:25,857 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 06:35:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:25,926 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-11-09 06:35:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:25,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2024-11-09 06:35:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:25,928 INFO L225 Difference]: With dead ends: 43 [2024-11-09 06:35:25,928 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 06:35:25,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:35:25,930 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:25,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 06:35:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2024-11-09 06:35:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:35:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-09 06:35:25,963 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 28 [2024-11-09 06:35:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:25,963 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-09 06:35:25,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 06:35:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-09 06:35:25,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:35:25,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:25,964 INFO L215 NwaCegarLoop]: trace histogram [6, 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] [2024-11-09 06:35:25,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:35:26,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:26,165 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:26,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1304708489, now seen corresponding path program 1 times [2024-11-09 06:35:26,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:26,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126478420] [2024-11-09 06:35:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:26,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471370287] [2024-11-09 06:35:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:26,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:26,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:35:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:26,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:35:26,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 06:35:26,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:26,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126478420] [2024-11-09 06:35:26,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471370287] [2024-11-09 06:35:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471370287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:26,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:35:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919603962] [2024-11-09 06:35:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:26,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:26,363 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:35:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:26,440 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-11-09 06:35:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2024-11-09 06:35:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:26,443 INFO L225 Difference]: With dead ends: 51 [2024-11-09 06:35:26,443 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 06:35:26,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:35:26,444 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:26,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 06:35:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-09 06:35:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 06:35:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-11-09 06:35:26,469 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 33 [2024-11-09 06:35:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:26,469 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-11-09 06:35:26,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:35:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-11-09 06:35:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 06:35:26,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:26,471 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 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] [2024-11-09 06:35:26,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:35:26,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:26,675 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:26,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1794090422, now seen corresponding path program 1 times [2024-11-09 06:35:26,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:26,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508072227] [2024-11-09 06:35:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812925827] [2024-11-09 06:35:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:26,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:26,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:35:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:26,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:35:26,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 06:35:26,887 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:26,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508072227] [2024-11-09 06:35:26,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812925827] [2024-11-09 06:35:26,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812925827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:26,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:26,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:35:26,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972775919] [2024-11-09 06:35:26,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:26,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:26,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:26,890 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:35:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:26,968 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-11-09 06:35:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:26,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2024-11-09 06:35:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:26,970 INFO L225 Difference]: With dead ends: 55 [2024-11-09 06:35:26,971 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 06:35:26,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:35:26,972 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:26,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 06:35:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-09 06:35:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 06:35:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-09 06:35:27,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 38 [2024-11-09 06:35:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:27,002 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-09 06:35:27,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:35:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-09 06:35:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 06:35:27,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:27,004 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:27,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:27,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:27,208 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:27,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash -288919191, now seen corresponding path program 1 times [2024-11-09 06:35:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:27,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448899990] [2024-11-09 06:35:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148115794] [2024-11-09 06:35:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:27,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:27,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:35:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:27,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:35:27,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 06:35:27,457 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:27,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448899990] [2024-11-09 06:35:27,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148115794] [2024-11-09 06:35:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148115794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:27,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:27,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:35:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940633803] [2024-11-09 06:35:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:27,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:27,460 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 06:35:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:27,562 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2024-11-09 06:35:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2024-11-09 06:35:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:27,564 INFO L225 Difference]: With dead ends: 59 [2024-11-09 06:35:27,564 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 06:35:27,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:35:27,566 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:27,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 114 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 06:35:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-09 06:35:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 06:35:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-11-09 06:35:27,590 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 43 [2024-11-09 06:35:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:27,590 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-11-09 06:35:27,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 06:35:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-11-09 06:35:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 06:35:27,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:27,592 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2024-11-09 06:35:27,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:35:27,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:27,793 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:27,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1763341077, now seen corresponding path program 1 times [2024-11-09 06:35:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856445670] [2024-11-09 06:35:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660996131] [2024-11-09 06:35:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:27,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:27,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:27,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:35:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:27,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 06:35:27,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 06:35:27,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 06:35:28,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:28,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856445670] [2024-11-09 06:35:28,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:28,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660996131] [2024-11-09 06:35:28,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660996131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37709417] [2024-11-09 06:35:28,066 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 06:35:28,066 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:28,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:28,067 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:28,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:31,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:35:31,289 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:35:31,291 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:33,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1850#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:35:33,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:33,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:35:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-09 06:35:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768264052] [2024-11-09 06:35:33,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:33,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:35:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:35:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:35:33,299 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 06:35:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:33,449 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2024-11-09 06:35:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:35:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 50 [2024-11-09 06:35:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:33,452 INFO L225 Difference]: With dead ends: 84 [2024-11-09 06:35:33,452 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 06:35:33,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:35:33,454 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:33,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 194 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 06:35:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2024-11-09 06:35:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 06:35:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-11-09 06:35:33,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2024-11-09 06:35:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:33,492 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-11-09 06:35:33,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 06:35:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-11-09 06:35:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 06:35:33,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:33,493 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2024-11-09 06:35:33,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:35:33,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:33,697 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:33,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:33,697 INFO L85 PathProgramCache]: Analyzing trace with hash -139533089, now seen corresponding path program 1 times [2024-11-09 06:35:33,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:33,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632168875] [2024-11-09 06:35:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:33,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 06:35:33,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632168875] [2024-11-09 06:35:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632168875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261712515] [2024-11-09 06:35:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:33,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:33,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:35:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:33,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:35:33,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 06:35:33,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 06:35:34,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261712515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869111579] [2024-11-09 06:35:34,070 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:35:34,070 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:34,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:34,070 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:34,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:37,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:35:37,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:35:37,531 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:40,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:35:40,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:40,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-09 06:35:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313567467] [2024-11-09 06:35:40,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:40,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:35:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:35:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:35:40,460 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:35:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:40,784 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2024-11-09 06:35:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:35:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2024-11-09 06:35:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:40,786 INFO L225 Difference]: With dead ends: 99 [2024-11-09 06:35:40,787 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 06:35:40,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:35:40,788 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:40,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 204 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 06:35:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2024-11-09 06:35:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-09 06:35:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2024-11-09 06:35:40,826 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 52 [2024-11-09 06:35:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:40,826 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2024-11-09 06:35:40,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 06:35:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2024-11-09 06:35:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 06:35:40,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:40,828 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2024-11-09 06:35:40,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:41,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:41,028 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:41,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1467479315, now seen corresponding path program 1 times [2024-11-09 06:35:41,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:41,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791175967] [2024-11-09 06:35:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:41,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929412527] [2024-11-09 06:35:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:41,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:41,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:35:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:41,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 06:35:41,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 06:35:41,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 06:35:41,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791175967] [2024-11-09 06:35:41,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929412527] [2024-11-09 06:35:41,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929412527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689255161] [2024-11-09 06:35:41,884 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:35:41,884 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:41,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:41,884 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:41,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:45,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:35:45,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:35:45,232 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:48,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3091#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:35:48,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:48,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:35:48,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2024-11-09 06:35:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27611894] [2024-11-09 06:35:48,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:48,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:35:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:35:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:35:48,310 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-09 06:35:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:49,736 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2024-11-09 06:35:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:35:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) Word has length 58 [2024-11-09 06:35:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:49,739 INFO L225 Difference]: With dead ends: 114 [2024-11-09 06:35:49,739 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 06:35:49,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 132 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:35:49,740 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:49,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 245 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:35:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 06:35:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2024-11-09 06:35:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 06:35:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2024-11-09 06:35:49,802 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 58 [2024-11-09 06:35:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:49,802 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2024-11-09 06:35:49,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-09 06:35:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2024-11-09 06:35:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 06:35:49,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:49,804 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 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] [2024-11-09 06:35:49,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:35:50,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:50,008 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:50,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1312078963, now seen corresponding path program 2 times [2024-11-09 06:35:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:50,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277319495] [2024-11-09 06:35:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293957450] [2024-11-09 06:35:50,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:50,037 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:35:50,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:35:50,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:50,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:35:50,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 40 proven. 19 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-09 06:35:51,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:51,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:51,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277319495] [2024-11-09 06:35:51,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:35:51,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293957450] [2024-11-09 06:35:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293957450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885514465] [2024-11-09 06:35:51,308 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:35:51,309 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:51,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:51,309 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:51,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:54,205 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:35:54,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:35:54,209 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:57,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3709#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:35:57,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:57,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:35:57,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 06:35:57,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967156717] [2024-11-09 06:35:57,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:57,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 06:35:57,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 06:35:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:35:57,765 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-09 06:35:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:58,301 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2024-11-09 06:35:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:35:58,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 68 [2024-11-09 06:35:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:58,303 INFO L225 Difference]: With dead ends: 121 [2024-11-09 06:35:58,303 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 06:35:58,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 06:35:58,305 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:58,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 184 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:35:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 06:35:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-11-09 06:35:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 65 states have internal predecessors, (74), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-09 06:35:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2024-11-09 06:35:58,364 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 68 [2024-11-09 06:35:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:58,365 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2024-11-09 06:35:58,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-09 06:35:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2024-11-09 06:35:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 06:35:58,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:58,367 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 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] [2024-11-09 06:35:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:35:58,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:58,568 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:58,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1499278558, now seen corresponding path program 1 times [2024-11-09 06:35:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159543401] [2024-11-09 06:35:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:35:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552450660] [2024-11-09 06:35:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:58,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:58,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:58,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:35:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:58,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 06:35:58,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-09 06:35:59,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 06:36:00,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159543401] [2024-11-09 06:36:00,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552450660] [2024-11-09 06:36:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552450660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223769727] [2024-11-09 06:36:00,334 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:36:00,335 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:00,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:00,335 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:00,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:01,922 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:36:01,926 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:01,926 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:10,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4580#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:10,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:10,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:36:10,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-09 06:36:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986591135] [2024-11-09 06:36:10,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:10,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:36:10,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:36:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:36:10,418 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 06:36:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:13,255 INFO L93 Difference]: Finished difference Result 201 states and 289 transitions. [2024-11-09 06:36:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:36:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2024-11-09 06:36:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:13,258 INFO L225 Difference]: With dead ends: 201 [2024-11-09 06:36:13,258 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 06:36:13,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 06:36:13,260 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 78 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:13,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 424 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:36:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 06:36:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2024-11-09 06:36:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 100 states have (on average 1.21) internal successors, (121), 101 states have internal predecessors, (121), 79 states have call successors, (79), 13 states have call predecessors, (79), 13 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2024-11-09 06:36:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 278 transitions. [2024-11-09 06:36:13,359 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 278 transitions. Word has length 74 [2024-11-09 06:36:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:13,359 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 278 transitions. [2024-11-09 06:36:13,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 06:36:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 278 transitions. [2024-11-09 06:36:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:36:13,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:13,362 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:13,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:13,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:13,562 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:13,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1182695818, now seen corresponding path program 3 times [2024-11-09 06:36:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071591568] [2024-11-09 06:36:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:13,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:36:13,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:13,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071591568] [2024-11-09 06:36:13,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071591568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:13,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:13,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:36:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557751616] [2024-11-09 06:36:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:13,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:36:13,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:13,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:36:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:36:13,697 INFO L87 Difference]: Start difference. First operand 193 states and 278 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:36:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:13,857 INFO L93 Difference]: Finished difference Result 246 states and 350 transitions. [2024-11-09 06:36:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:36:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2024-11-09 06:36:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:13,859 INFO L225 Difference]: With dead ends: 246 [2024-11-09 06:36:13,859 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 06:36:13,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:36:13,861 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:13,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 06:36:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2024-11-09 06:36:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 84 states have internal predecessors, (96), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-09 06:36:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 221 transitions. [2024-11-09 06:36:13,941 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 221 transitions. Word has length 88 [2024-11-09 06:36:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:13,942 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 221 transitions. [2024-11-09 06:36:13,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:36:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 221 transitions. [2024-11-09 06:36:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 06:36:13,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:13,945 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:13,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:36:13,945 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:13,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:13,945 INFO L85 PathProgramCache]: Analyzing trace with hash 162080370, now seen corresponding path program 1 times [2024-11-09 06:36:13,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:13,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726143466] [2024-11-09 06:36:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:13,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:36:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980733504] [2024-11-09 06:36:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:13,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:13,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:13,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:36:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:14,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:36:14,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-11-09 06:36:15,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:17,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:17,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726143466] [2024-11-09 06:36:17,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:17,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980733504] [2024-11-09 06:36:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980733504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753841064] [2024-11-09 06:36:17,082 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:36:17,083 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:17,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:17,083 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:17,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:18,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:36:18,300 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:18,301 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:20,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6342#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:20,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:20,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:36:20,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-09 06:36:20,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691412902] [2024-11-09 06:36:20,259 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:20,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:36:20,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:36:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:36:20,261 INFO L87 Difference]: Start difference. First operand 160 states and 221 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-09 06:36:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:21,181 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2024-11-09 06:36:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:36:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 90 [2024-11-09 06:36:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:21,183 INFO L225 Difference]: With dead ends: 170 [2024-11-09 06:36:21,184 INFO L226 Difference]: Without dead ends: 168 [2024-11-09 06:36:21,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 162 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:36:21,185 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:21,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 182 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:36:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-09 06:36:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2024-11-09 06:36:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 77 states have internal predecessors, (86), 54 states have call successors, (54), 12 states have call predecessors, (54), 12 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-09 06:36:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2024-11-09 06:36:21,256 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 90 [2024-11-09 06:36:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:21,256 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2024-11-09 06:36:21,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-09 06:36:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2024-11-09 06:36:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 06:36:21,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:21,259 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:21,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:36:21,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:21,463 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:21,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash 388768494, now seen corresponding path program 2 times [2024-11-09 06:36:21,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903167513] [2024-11-09 06:36:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:36:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046072003] [2024-11-09 06:36:21,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:21,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:21,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:21,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:36:21,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:36:21,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:21,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:36:21,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2024-11-09 06:36:22,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2024-11-09 06:36:22,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:22,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903167513] [2024-11-09 06:36:22,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046072003] [2024-11-09 06:36:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046072003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192622286] [2024-11-09 06:36:22,642 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:36:22,642 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:22,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:22,643 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:22,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:24,087 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:36:24,091 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:24,092 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:30,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7535#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:30,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:30,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:36:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-09 06:36:30,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776312852] [2024-11-09 06:36:30,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:30,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:36:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:36:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:36:30,689 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2024-11-09 06:36:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:32,002 INFO L93 Difference]: Finished difference Result 173 states and 237 transitions. [2024-11-09 06:36:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:36:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 107 [2024-11-09 06:36:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:32,004 INFO L225 Difference]: With dead ends: 173 [2024-11-09 06:36:32,004 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 06:36:32,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 06:36:32,005 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:32,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 362 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:36:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 06:36:32,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 146. [2024-11-09 06:36:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 78 states have (on average 1.141025641025641) internal successors, (89), 80 states have internal predecessors, (89), 54 states have call successors, (54), 13 states have call predecessors, (54), 13 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-09 06:36:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2024-11-09 06:36:32,091 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 107 [2024-11-09 06:36:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:32,092 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2024-11-09 06:36:32,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2024-11-09 06:36:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2024-11-09 06:36:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 06:36:32,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:32,093 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:32,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:36:32,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:36:32,294 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:32,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash 895514417, now seen corresponding path program 3 times [2024-11-09 06:36:32,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:32,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165529345] [2024-11-09 06:36:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:32,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:36:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531398485] [2024-11-09 06:36:32,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:36:32,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:32,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:32,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:36:32,455 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:36:32,455 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:32,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:36:32,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2024-11-09 06:36:33,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:34,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165529345] [2024-11-09 06:36:34,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531398485] [2024-11-09 06:36:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531398485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432262234] [2024-11-09 06:36:34,175 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:36:34,176 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:34,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:34,176 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:34,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:35,268 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:36:35,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:35,283 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:38,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8470#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:38,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:38,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:36:38,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-09 06:36:38,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928435341] [2024-11-09 06:36:38,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:38,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:36:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:38,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:36:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:36:38,076 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 06:36:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:39,111 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2024-11-09 06:36:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:36:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) Word has length 112 [2024-11-09 06:36:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:39,113 INFO L225 Difference]: With dead ends: 181 [2024-11-09 06:36:39,113 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 06:36:39,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 175 SyntacticMatches, 20 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:36:39,115 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:39,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 370 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:36:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 06:36:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2024-11-09 06:36:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 85 states have internal predecessors, (93), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-09 06:36:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2024-11-09 06:36:39,216 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 112 [2024-11-09 06:36:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:39,216 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2024-11-09 06:36:39,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 06:36:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2024-11-09 06:36:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 06:36:39,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:39,219 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:39,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:39,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:36:39,419 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:39,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1441975848, now seen corresponding path program 4 times [2024-11-09 06:36:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:39,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923258170] [2024-11-09 06:36:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:36:39,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475060369] [2024-11-09 06:36:39,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:36:39,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:39,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:39,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:36:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:39,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 06:36:39,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 78 proven. 75 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2024-11-09 06:36:41,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:42,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923258170] [2024-11-09 06:36:42,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475060369] [2024-11-09 06:36:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475060369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113811535] [2024-11-09 06:36:42,006 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:36:42,006 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:42,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:42,006 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:42,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:43,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:36:43,101 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:43,102 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:46,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9428#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:46,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:46,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:36:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 06:36:46,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602639961] [2024-11-09 06:36:46,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:46,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:36:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:36:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:36:46,502 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-09 06:36:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:49,276 INFO L93 Difference]: Finished difference Result 203 states and 279 transitions. [2024-11-09 06:36:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:36:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 7 states have call successors, (21) Word has length 115 [2024-11-09 06:36:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:49,279 INFO L225 Difference]: With dead ends: 203 [2024-11-09 06:36:49,279 INFO L226 Difference]: Without dead ends: 201 [2024-11-09 06:36:49,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 178 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:36:49,281 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:49,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 431 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 06:36:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-09 06:36:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 190. [2024-11-09 06:36:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 100 states have (on average 1.14) internal successors, (114), 102 states have internal predecessors, (114), 74 states have call successors, (74), 15 states have call predecessors, (74), 15 states have return successors, (73), 72 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-09 06:36:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 261 transitions. [2024-11-09 06:36:49,410 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 261 transitions. Word has length 115 [2024-11-09 06:36:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:49,410 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 261 transitions. [2024-11-09 06:36:49,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-09 06:36:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 261 transitions. [2024-11-09 06:36:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 06:36:49,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:49,413 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:49,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:49,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:36:49,615 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:49,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -883793197, now seen corresponding path program 2 times [2024-11-09 06:36:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:49,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657067729] [2024-11-09 06:36:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:36:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020893245] [2024-11-09 06:36:49,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:49,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:49,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:49,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:49,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:36:49,773 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:36:49,773 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:49,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 06:36:49,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-09 06:36:50,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-09 06:36:53,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657067729] [2024-11-09 06:36:53,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:36:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020893245] [2024-11-09 06:36:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020893245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127911850] [2024-11-09 06:36:53,723 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:36:53,723 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:53,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:53,724 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:53,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:54,860 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:36:54,874 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:36:54,875 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:58,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10856#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:36:58,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:58,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:36:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-11-09 06:36:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97489999] [2024-11-09 06:36:58,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:58,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:36:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:36:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:36:58,562 INFO L87 Difference]: Start difference. First operand 190 states and 261 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 15 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-09 06:37:06,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 06:37:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:09,627 INFO L93 Difference]: Finished difference Result 292 states and 415 transitions. [2024-11-09 06:37:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 06:37:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 15 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 121 [2024-11-09 06:37:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:09,630 INFO L225 Difference]: With dead ends: 292 [2024-11-09 06:37:09,630 INFO L226 Difference]: Without dead ends: 284 [2024-11-09 06:37:09,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 296 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=851, Invalid=5311, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 06:37:09,633 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 129 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:09,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 852 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-09 06:37:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-09 06:37:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 259. [2024-11-09 06:37:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 132 states have internal predecessors, (152), 110 states have call successors, (110), 18 states have call predecessors, (110), 18 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2024-11-09 06:37:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2024-11-09 06:37:09,892 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 121 [2024-11-09 06:37:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:09,893 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2024-11-09 06:37:09,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 15 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-09 06:37:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2024-11-09 06:37:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:37:09,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:09,895 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:09,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:37:10,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:37:10,102 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:10,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2000871760, now seen corresponding path program 5 times [2024-11-09 06:37:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:10,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144291839] [2024-11-09 06:37:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:10,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:37:10,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361589579] [2024-11-09 06:37:10,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:37:10,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:10,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:10,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:10,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:37:10,243 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:37:10,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:10,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 06:37:10,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 159 proven. 71 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2024-11-09 06:37:12,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:30,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:30,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144291839] [2024-11-09 06:37:30,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:37:30,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361589579] [2024-11-09 06:37:30,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361589579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:30,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942627982] [2024-11-09 06:37:30,778 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:37:30,778 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:30,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:30,778 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:30,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:31,812 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:37:31,825 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:37:31,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:41,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12438#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:37:41,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:41,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:41,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-09 06:37:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440234318] [2024-11-09 06:37:41,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:41,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:37:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:37:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1318, Unknown=5, NotChecked=0, Total=1560 [2024-11-09 06:37:41,457 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-09 06:37:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:42,422 INFO L93 Difference]: Finished difference Result 309 states and 437 transitions. [2024-11-09 06:37:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:37:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) Word has length 134 [2024-11-09 06:37:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:42,425 INFO L225 Difference]: With dead ends: 309 [2024-11-09 06:37:42,425 INFO L226 Difference]: Without dead ends: 307 [2024-11-09 06:37:42,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 270 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=278, Invalid=1523, Unknown=5, NotChecked=0, Total=1806 [2024-11-09 06:37:42,426 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:42,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:37:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-09 06:37:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2024-11-09 06:37:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 158 states have internal predecessors, (182), 126 states have call successors, (126), 22 states have call predecessors, (126), 22 states have return successors, (125), 124 states have call predecessors, (125), 125 states have call successors, (125) [2024-11-09 06:37:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 433 transitions. [2024-11-09 06:37:42,750 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 433 transitions. Word has length 134 [2024-11-09 06:37:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:42,751 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 433 transitions. [2024-11-09 06:37:42,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-09 06:37:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 433 transitions. [2024-11-09 06:37:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:37:42,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:42,754 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:42,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:37:42,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:42,955 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:42,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1327878759, now seen corresponding path program 6 times [2024-11-09 06:37:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:42,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402783946] [2024-11-09 06:37:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:37:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012124103] [2024-11-09 06:37:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:43,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:43,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:43,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:37:43,136 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:43,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:43,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 06:37:43,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 146 proven. 104 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-09 06:37:45,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:45,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:45,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402783946] [2024-11-09 06:37:45,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:37:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012124103] [2024-11-09 06:37:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012124103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344113162] [2024-11-09 06:37:45,617 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:37:45,617 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:45,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:45,618 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:45,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:46,792 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:37:46,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:37:46,796 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:57,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13940#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:37:57,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:57,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:57,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 06:37:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77910649] [2024-11-09 06:37:57,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:57,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:37:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:37:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:37:57,005 INFO L87 Difference]: Start difference. First operand 305 states and 433 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-09 06:37:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:59,113 INFO L93 Difference]: Finished difference Result 322 states and 447 transitions. [2024-11-09 06:37:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 06:37:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) Word has length 137 [2024-11-09 06:37:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:59,116 INFO L225 Difference]: With dead ends: 322 [2024-11-09 06:37:59,116 INFO L226 Difference]: Without dead ends: 320 [2024-11-09 06:37:59,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 06:37:59,119 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:59,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 451 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:37:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-09 06:37:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 289. [2024-11-09 06:37:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 155 states have internal predecessors, (175), 113 states have call successors, (113), 23 states have call predecessors, (113), 23 states have return successors, (112), 110 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-09 06:37:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 400 transitions. [2024-11-09 06:37:59,527 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 400 transitions. Word has length 137 [2024-11-09 06:37:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:59,527 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 400 transitions. [2024-11-09 06:37:59,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-09 06:37:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 400 transitions. [2024-11-09 06:37:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:37:59,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:59,530 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:59,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:37:59,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:59,734 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:59,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1094353481, now seen corresponding path program 7 times [2024-11-09 06:37:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344262411] [2024-11-09 06:37:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:37:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738851628] [2024-11-09 06:37:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:37:59,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:59,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:59,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:59,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:37:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:59,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:37:59,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 131 proven. 77 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2024-11-09 06:38:05,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:05,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344262411] [2024-11-09 06:38:05,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:38:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738851628] [2024-11-09 06:38:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738851628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681012516] [2024-11-09 06:38:05,902 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:38:05,903 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:05,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:05,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:05,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:06,937 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:38:06,952 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:38:06,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:11,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15445#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:38:11,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:11,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:38:11,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-09 06:38:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808228088] [2024-11-09 06:38:11,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:11,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 06:38:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 06:38:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:38:11,195 INFO L87 Difference]: Start difference. First operand 289 states and 400 transitions. Second operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-11-09 06:38:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:17,941 INFO L93 Difference]: Finished difference Result 350 states and 494 transitions. [2024-11-09 06:38:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:38:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 137 [2024-11-09 06:38:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:17,945 INFO L225 Difference]: With dead ends: 350 [2024-11-09 06:38:17,945 INFO L226 Difference]: Without dead ends: 348 [2024-11-09 06:38:17,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 217 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:38:17,946 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 36 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:17,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 444 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 06:38:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-11-09 06:38:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 297. [2024-11-09 06:38:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 157 states have internal predecessors, (179), 118 states have call successors, (118), 23 states have call predecessors, (118), 23 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-11-09 06:38:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2024-11-09 06:38:18,281 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 137 [2024-11-09 06:38:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:18,281 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2024-11-09 06:38:18,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-11-09 06:38:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2024-11-09 06:38:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 06:38:18,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:18,284 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:18,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:18,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:18,489 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:18,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1265642843, now seen corresponding path program 3 times [2024-11-09 06:38:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145455516] [2024-11-09 06:38:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:38:18,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437563264] [2024-11-09 06:38:18,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:18,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:18,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:38:18,642 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:18,642 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:18,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 06:38:18,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 54 proven. 110 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2024-11-09 06:38:19,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2024-11-09 06:38:23,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145455516] [2024-11-09 06:38:23,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:38:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437563264] [2024-11-09 06:38:23,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437563264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512472611] [2024-11-09 06:38:23,683 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:38:23,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:23,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:23,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:23,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:24,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-09 06:38:24,951 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:38:24,952 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:35,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17426#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:38:35,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:35,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:38:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-11-09 06:38:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715482420] [2024-11-09 06:38:35,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:35,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 06:38:35,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 06:38:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:38:35,612 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 30 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 17 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 14 states have call predecessors, (49), 15 states have call successors, (49) [2024-11-09 06:38:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:47,026 INFO L93 Difference]: Finished difference Result 440 states and 649 transitions. [2024-11-09 06:38:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:38:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 17 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 14 states have call predecessors, (49), 15 states have call successors, (49) Word has length 140 [2024-11-09 06:38:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:47,030 INFO L225 Difference]: With dead ends: 440 [2024-11-09 06:38:47,030 INFO L226 Difference]: Without dead ends: 432 [2024-11-09 06:38:47,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=911, Invalid=5895, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 06:38:47,033 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 101 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:47,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 661 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-09 06:38:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-11-09 06:38:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 337. [2024-11-09 06:38:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 172 states have internal predecessors, (198), 142 states have call successors, (142), 24 states have call predecessors, (142), 24 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2024-11-09 06:38:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 481 transitions. [2024-11-09 06:38:47,519 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 481 transitions. Word has length 140 [2024-11-09 06:38:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:47,519 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 481 transitions. [2024-11-09 06:38:47,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 17 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 14 states have call predecessors, (49), 15 states have call successors, (49) [2024-11-09 06:38:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 481 transitions. [2024-11-09 06:38:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 06:38:47,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:47,522 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:47,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 06:38:47,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 06:38:47,722 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:47,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 414354790, now seen corresponding path program 8 times [2024-11-09 06:38:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040599320] [2024-11-09 06:38:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:47,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:38:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386280777] [2024-11-09 06:38:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:38:47,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:47,758 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:47,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:38:47,934 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:38:47,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:47,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:38:47,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 139 proven. 112 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2024-11-09 06:38:50,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:50,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040599320] [2024-11-09 06:38:50,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:38:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386280777] [2024-11-09 06:38:50,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386280777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824011171] [2024-11-09 06:38:50,954 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:38:50,954 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:50,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:50,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:50,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:51,882 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:38:51,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:38:51,898 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:54,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19339#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:38:54,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:54,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:38:54,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 06:38:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977104651] [2024-11-09 06:38:54,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:54,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:38:54,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:38:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:38:54,911 INFO L87 Difference]: Start difference. First operand 337 states and 481 transitions. Second operand has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 06:38:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:56,811 INFO L93 Difference]: Finished difference Result 411 states and 589 transitions. [2024-11-09 06:38:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:38:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) Word has length 159 [2024-11-09 06:38:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:56,815 INFO L225 Difference]: With dead ends: 411 [2024-11-09 06:38:56,815 INFO L226 Difference]: Without dead ends: 409 [2024-11-09 06:38:56,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 258 SyntacticMatches, 30 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:38:56,817 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:56,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 465 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:38:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-09 06:38:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 337. [2024-11-09 06:38:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 172 states have internal predecessors, (198), 142 states have call successors, (142), 24 states have call predecessors, (142), 24 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2024-11-09 06:38:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 481 transitions. [2024-11-09 06:38:57,373 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 481 transitions. Word has length 159 [2024-11-09 06:38:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:57,374 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 481 transitions. [2024-11-09 06:38:57,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-09 06:38:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 481 transitions. [2024-11-09 06:38:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 06:38:57,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:57,376 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:57,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 06:38:57,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 06:38:57,577 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:57,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:57,577 INFO L85 PathProgramCache]: Analyzing trace with hash -346863672, now seen corresponding path program 9 times [2024-11-09 06:38:57,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:57,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820859079] [2024-11-09 06:38:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:38:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067067042] [2024-11-09 06:38:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:57,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:57,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:57,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:38:57,732 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:57,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:57,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 06:38:57,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 213 proven. 113 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2024-11-09 06:39:00,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:00,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820859079] [2024-11-09 06:39:00,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:39:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067067042] [2024-11-09 06:39:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067067042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441448722] [2024-11-09 06:39:00,391 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:39:00,391 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:00,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:00,391 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:00,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:01,263 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:39:01,277 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:39:01,278 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:04,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21144#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:39:04,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:04,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:39:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-09 06:39:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025458476] [2024-11-09 06:39:04,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:04,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:39:04,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:39:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:39:04,401 INFO L87 Difference]: Start difference. First operand 337 states and 481 transitions. Second operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-09 06:39:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:06,503 INFO L93 Difference]: Finished difference Result 411 states and 590 transitions. [2024-11-09 06:39:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 06:39:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) Word has length 159 [2024-11-09 06:39:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:06,507 INFO L225 Difference]: With dead ends: 411 [2024-11-09 06:39:06,507 INFO L226 Difference]: Without dead ends: 409 [2024-11-09 06:39:06,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 254 SyntacticMatches, 30 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 06:39:06,509 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:06,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 414 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:39:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-09 06:39:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 369. [2024-11-09 06:39:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 184 states have (on average 1.173913043478261) internal successors, (216), 186 states have internal predecessors, (216), 158 states have call successors, (158), 26 states have call predecessors, (158), 26 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2024-11-09 06:39:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 531 transitions. [2024-11-09 06:39:07,152 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 531 transitions. Word has length 159 [2024-11-09 06:39:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:07,153 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 531 transitions. [2024-11-09 06:39:07,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-09 06:39:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 531 transitions. [2024-11-09 06:39:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 06:39:07,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:07,155 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:07,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:39:07,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 06:39:07,356 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:07,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -580388950, now seen corresponding path program 10 times [2024-11-09 06:39:07,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:07,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715621393] [2024-11-09 06:39:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:39:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970522353] [2024-11-09 06:39:07,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:39:07,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:07,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:07,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:07,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:39:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:07,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 06:39:07,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 142 proven. 127 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2024-11-09 06:39:09,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:09,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715621393] [2024-11-09 06:39:09,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:39:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970522353] [2024-11-09 06:39:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970522353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564458507] [2024-11-09 06:39:09,671 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:39:09,671 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:09,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:09,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:09,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:10,633 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:39:10,643 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:39:10,644 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:12,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23010#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:39:12,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:12,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:39:12,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 06:39:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805411614] [2024-11-09 06:39:12,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:12,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:39:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:39:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:39:12,266 INFO L87 Difference]: Start difference. First operand 369 states and 531 transitions. Second operand has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-09 06:39:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:14,789 INFO L93 Difference]: Finished difference Result 410 states and 589 transitions. [2024-11-09 06:39:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:39:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) Word has length 159 [2024-11-09 06:39:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:14,792 INFO L225 Difference]: With dead ends: 410 [2024-11-09 06:39:14,793 INFO L226 Difference]: Without dead ends: 408 [2024-11-09 06:39:14,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 279 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:39:14,794 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 41 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:14,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 747 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:39:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-09 06:39:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 369. [2024-11-09 06:39:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 184 states have (on average 1.173913043478261) internal successors, (216), 186 states have internal predecessors, (216), 158 states have call successors, (158), 26 states have call predecessors, (158), 26 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2024-11-09 06:39:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 531 transitions. [2024-11-09 06:39:15,273 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 531 transitions. Word has length 159 [2024-11-09 06:39:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:15,273 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 531 transitions. [2024-11-09 06:39:15,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-09 06:39:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 531 transitions. [2024-11-09 06:39:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 06:39:15,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:15,276 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:15,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 06:39:15,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:39:15,480 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:15,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -478605357, now seen corresponding path program 11 times [2024-11-09 06:39:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22366398] [2024-11-09 06:39:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:39:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934690480] [2024-11-09 06:39:15,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:39:15,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:15,515 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:15,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 06:39:23,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:39:23,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:39:23,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-09 06:39:23,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 348 proven. 61 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2024-11-09 06:39:40,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:55,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22366398] [2024-11-09 06:39:55,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:39:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934690480] [2024-11-09 06:39:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934690480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710218958] [2024-11-09 06:39:55,732 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:39:55,733 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:55,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:55,733 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:55,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:56,618 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:39:56,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:39:56,631 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:03,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24966#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:40:03,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:03,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:40:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 06:40:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790340540] [2024-11-09 06:40:03,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:03,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:40:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:40:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1661, Unknown=3, NotChecked=0, Total=1980 [2024-11-09 06:40:03,404 INFO L87 Difference]: Start difference. First operand 369 states and 531 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2024-11-09 06:40:13,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:40:15,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:40:33,909 WARN L286 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 56 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:40:42,146 WARN L286 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 56 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:40:53,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:40:56,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:40:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:59,320 INFO L93 Difference]: Finished difference Result 445 states and 641 transitions. [2024-11-09 06:40:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:40:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) Word has length 162 [2024-11-09 06:40:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:59,328 INFO L225 Difference]: With dead ends: 445 [2024-11-09 06:40:59,328 INFO L226 Difference]: Without dead ends: 441 [2024-11-09 06:40:59,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 300 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=627, Invalid=3150, Unknown=5, NotChecked=0, Total=3782 [2024-11-09 06:40:59,334 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:59,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 376 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 547 Invalid, 3 Unknown, 0 Unchecked, 17.9s Time] [2024-11-09 06:40:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-11-09 06:41:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 437. [2024-11-09 06:41:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 217 states have (on average 1.1705069124423964) internal successors, (254), 218 states have internal predecessors, (254), 190 states have call successors, (190), 30 states have call predecessors, (190), 29 states have return successors, (189), 188 states have call predecessors, (189), 189 states have call successors, (189) [2024-11-09 06:41:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2024-11-09 06:41:00,105 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 162 [2024-11-09 06:41:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:00,105 INFO L471 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2024-11-09 06:41:00,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2024-11-09 06:41:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2024-11-09 06:41:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-09 06:41:00,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:00,108 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:00,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 06:41:00,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:41:00,309 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:00,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1164368781, now seen corresponding path program 4 times [2024-11-09 06:41:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494628836] [2024-11-09 06:41:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:41:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315766264] [2024-11-09 06:41:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:41:00,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:00,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:00,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 06:41:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:00,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 06:41:00,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 115 proven. 104 refuted. 0 times theorem prover too weak. 1060 trivial. 0 not checked. [2024-11-09 06:41:02,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:09,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494628836] [2024-11-09 06:41:09,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:41:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315766264] [2024-11-09 06:41:09,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315766264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984952835] [2024-11-09 06:41:09,024 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:41:09,024 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:09,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:09,024 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:09,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:10,444 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:41:10,458 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:41:10,459 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:15,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27337#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:41:15,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:15,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:41:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 06:41:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649218616] [2024-11-09 06:41:15,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:15,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:41:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:41:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:41:15,330 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-09 06:41:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:18,538 INFO L93 Difference]: Finished difference Result 480 states and 694 transitions. [2024-11-09 06:41:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:41:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 165 [2024-11-09 06:41:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:18,543 INFO L225 Difference]: With dead ends: 480 [2024-11-09 06:41:18,543 INFO L226 Difference]: Without dead ends: 475 [2024-11-09 06:41:18,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 353 SyntacticMatches, 31 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 06:41:18,544 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:18,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 469 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:41:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-11-09 06:41:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 441. [2024-11-09 06:41:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 221 states have internal predecessors, (257), 190 states have call successors, (190), 31 states have call predecessors, (190), 30 states have return successors, (189), 188 states have call predecessors, (189), 189 states have call successors, (189) [2024-11-09 06:41:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 636 transitions. [2024-11-09 06:41:19,447 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 636 transitions. Word has length 165 [2024-11-09 06:41:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:19,448 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 636 transitions. [2024-11-09 06:41:19,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-09 06:41:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 636 transitions. [2024-11-09 06:41:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-09 06:41:19,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:19,451 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:19,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 06:41:19,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:41:19,652 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:19,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1409634732, now seen corresponding path program 5 times [2024-11-09 06:41:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656813478] [2024-11-09 06:41:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:41:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858554091] [2024-11-09 06:41:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:41:19,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:19,710 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:19,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 06:41:19,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:41:19,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:19,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 06:41:19,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 207 proven. 107 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2024-11-09 06:41:23,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:25,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656813478] [2024-11-09 06:41:25,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:41:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858554091] [2024-11-09 06:41:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858554091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702345905] [2024-11-09 06:41:25,095 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:41:25,095 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:25,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:25,095 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:25,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:26,011 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:41:26,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:41:26,022 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:29,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29555#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:41:29,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:29,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:41:29,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 06:41:29,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341709542] [2024-11-09 06:41:29,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:29,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:41:29,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:41:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:41:29,517 INFO L87 Difference]: Start difference. First operand 441 states and 636 transitions. Second operand has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-09 06:41:33,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:41:37,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:41:39,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:41:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:42,497 INFO L93 Difference]: Finished difference Result 546 states and 769 transitions. [2024-11-09 06:41:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:41:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) Word has length 187 [2024-11-09 06:41:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:42,501 INFO L225 Difference]: With dead ends: 546 [2024-11-09 06:41:42,501 INFO L226 Difference]: Without dead ends: 541 [2024-11-09 06:41:42,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 342 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:41:42,503 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:42,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 324 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 536 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2024-11-09 06:41:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-09 06:41:43,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 468. [2024-11-09 06:41:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 250 states have internal predecessors, (281), 179 states have call successors, (179), 41 states have call predecessors, (179), 40 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2024-11-09 06:41:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 638 transitions. [2024-11-09 06:41:43,266 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 638 transitions. Word has length 187 [2024-11-09 06:41:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:43,267 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 638 transitions. [2024-11-09 06:41:43,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-09 06:41:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 638 transitions. [2024-11-09 06:41:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-09 06:41:43,270 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:43,270 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:43,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 06:41:43,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:41:43,474 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:43,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash -104636675, now seen corresponding path program 6 times [2024-11-09 06:41:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:43,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180622943] [2024-11-09 06:41:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:41:43,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275983648] [2024-11-09 06:41:43,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:41:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:43,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:43,520 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:43,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 06:41:43,676 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:41:43,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:43,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-09 06:41:43,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 150 proven. 208 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2024-11-09 06:41:55,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:57,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:57,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180622943] [2024-11-09 06:41:57,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:41:57,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275983648] [2024-11-09 06:41:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275983648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:57,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026302443] [2024-11-09 06:41:57,282 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:41:57,282 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:57,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:57,282 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:57,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:58,295 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:41:58,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:41:58,312 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:14,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31921#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:42:14,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:14,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:42:14,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-09 06:42:14,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373082274] [2024-11-09 06:42:14,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:14,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:42:14,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:42:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:42:14,400 INFO L87 Difference]: Start difference. First operand 468 states and 638 transitions. Second operand has 24 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-09 06:42:37,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:38,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:40,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:43,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:47,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:50,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:52,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:55,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:42:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:55,173 INFO L93 Difference]: Finished difference Result 530 states and 726 transitions. [2024-11-09 06:42:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:42:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) Word has length 190 [2024-11-09 06:42:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:55,176 INFO L225 Difference]: With dead ends: 530 [2024-11-09 06:42:55,176 INFO L226 Difference]: Without dead ends: 525 [2024-11-09 06:42:55,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 314 SyntacticMatches, 37 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 06:42:55,178 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:55,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 548 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1305 Invalid, 1 Unknown, 0 Unchecked, 26.2s Time] [2024-11-09 06:42:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-09 06:42:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 492. [2024-11-09 06:42:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 261 states have (on average 1.1340996168582376) internal successors, (296), 263 states have internal predecessors, (296), 187 states have call successors, (187), 44 states have call predecessors, (187), 43 states have return successors, (186), 184 states have call predecessors, (186), 186 states have call successors, (186) [2024-11-09 06:42:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 669 transitions. [2024-11-09 06:42:56,020 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 669 transitions. Word has length 190 [2024-11-09 06:42:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:56,020 INFO L471 AbstractCegarLoop]: Abstraction has 492 states and 669 transitions. [2024-11-09 06:42:56,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-09 06:42:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 669 transitions. [2024-11-09 06:42:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-09 06:42:56,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:56,024 INFO L215 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:56,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 06:42:56,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:42:56,225 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:56,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 692722812, now seen corresponding path program 7 times [2024-11-09 06:42:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:56,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999347119] [2024-11-09 06:42:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:42:56,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080587223] [2024-11-09 06:42:56,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:42:56,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:56,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:56,281 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:56,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 06:42:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:56,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 06:42:56,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2261 backedges. 181 proven. 251 refuted. 0 times theorem prover too weak. 1829 trivial. 0 not checked. [2024-11-09 06:42:58,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:43:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2261 backedges. 273 proven. 138 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2024-11-09 06:43:01,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:43:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999347119] [2024-11-09 06:43:01,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:43:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080587223] [2024-11-09 06:43:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080587223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:43:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182547263] [2024-11-09 06:43:01,063 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:43:01,064 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:43:01,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:43:01,064 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:43:01,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:43:02,172 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:43:02,194 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:43:02,195 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:43:04,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34974#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:43:04,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:43:04,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:43:04,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 35 [2024-11-09 06:43:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096325697] [2024-11-09 06:43:04,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:43:04,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 06:43:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:43:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 06:43:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2183, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:43:04,781 INFO L87 Difference]: Start difference. First operand 492 states and 669 transitions. Second operand has 35 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 21 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (68), 19 states have call predecessors, (68), 19 states have call successors, (68) [2024-11-09 06:43:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:23,649 INFO L93 Difference]: Finished difference Result 927 states and 1371 transitions. [2024-11-09 06:43:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-09 06:43:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 21 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (68), 19 states have call predecessors, (68), 19 states have call successors, (68) Word has length 212 [2024-11-09 06:43:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:23,655 INFO L225 Difference]: With dead ends: 927 [2024-11-09 06:43:23,655 INFO L226 Difference]: Without dead ends: 833 [2024-11-09 06:43:23,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 577 SyntacticMatches, 10 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1313, Invalid=8587, Unknown=0, NotChecked=0, Total=9900 [2024-11-09 06:43:23,658 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 179 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:23,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1113 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-09 06:43:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2024-11-09 06:43:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 619. [2024-11-09 06:43:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 317 states have (on average 1.1545741324921135) internal successors, (366), 319 states have internal predecessors, (366), 251 states have call successors, (251), 51 states have call predecessors, (251), 50 states have return successors, (250), 248 states have call predecessors, (250), 250 states have call successors, (250) [2024-11-09 06:43:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 867 transitions. [2024-11-09 06:43:24,812 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 867 transitions. Word has length 212 [2024-11-09 06:43:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:24,813 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 867 transitions. [2024-11-09 06:43:24,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 21 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (68), 19 states have call predecessors, (68), 19 states have call successors, (68) [2024-11-09 06:43:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 867 transitions. [2024-11-09 06:43:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-09 06:43:24,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:43:24,817 INFO L215 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:24,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 06:43:25,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:43:25,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:43:25,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:43:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 186254686, now seen corresponding path program 8 times [2024-11-09 06:43:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:43:25,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14225352] [2024-11-09 06:43:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:43:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:43:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:43:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783136402] [2024-11-09 06:43:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:43:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:43:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:43:25,072 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:43:25,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 06:43:25,306 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 06:43:25,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:43:25,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:43:25,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:43:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2261 backedges. 352 proven. 124 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2024-11-09 06:43:28,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:43:29,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:43:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14225352] [2024-11-09 06:43:29,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:43:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783136402] [2024-11-09 06:43:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783136402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:43:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569295107] [2024-11-09 06:43:29,762 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:43:29,763 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:43:29,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:43:29,763 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:43:29,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:43:30,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2024-11-09 06:43:30,714 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:43:30,716 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:43:34,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38488#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:43:34,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:43:34,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:43:34,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 06:43:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848384586] [2024-11-09 06:43:34,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:43:34,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:43:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:43:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:43:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:43:34,323 INFO L87 Difference]: Start difference. First operand 619 states and 867 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 9 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-09 06:43:39,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:43:47,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 06:43:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:48,646 INFO L93 Difference]: Finished difference Result 619 states and 867 transitions. [2024-11-09 06:43:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:43:48,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 9 states have call predecessors, (24), 10 states have call successors, (24) Word has length 212 [2024-11-09 06:43:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:48,648 INFO L225 Difference]: With dead ends: 619 [2024-11-09 06:43:48,648 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 06:43:48,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 409 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=342, Invalid=2107, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 06:43:48,650 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:48,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 06:43:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 06:43:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 06:43:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:43:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 06:43:48,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2024-11-09 06:43:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:48,652 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 06:43:48,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 9 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-09 06:43:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 06:43:48,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 06:43:48,655 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 06:43:48,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 06:43:48,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d92b02-2daa-454f-9317-4194e57a3bf3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:43:48,863 INFO L407 BasicCegarLoop]: Path program histogram: [11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:48,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 06:43:59,263 WARN L286 SmtUtils]: Spent 10.39s on a formula simplification. DAG size of input: 473 DAG size of output: 746 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-09 06:48:49,523 WARN L286 SmtUtils]: Spent 4.84m on a formula simplification. DAG size of input: 1037 DAG size of output: 1879 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)