./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/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_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/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_1256b785-0e53-467d-9955-ef579bc89d82/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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:08:51,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:08:51,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:08:51,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:08:51,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:08:51,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:08:51,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:08:51,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:08:51,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:08:51,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:08:51,273 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:08:51,275 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:08:51,276 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:08:51,276 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:08:51,277 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:08:51,277 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:08:51,281 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:08:51,282 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:08:51,282 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:08:51,282 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:08:51,283 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:08:51,283 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:08:51,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:08:51,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:08:51,284 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:08:51,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:08:51,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:08:51,285 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:08:51,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:08:51,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:08:51,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:08:51,286 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:08:51,287 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:08:51,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:08:51,287 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:08:51,289 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:08:51,289 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:08:51,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:08:51,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:08:51,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:08:51,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:08:51,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:08:51,293 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:08:51,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:08:51,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:08:51,294 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:08:51,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:08:51,294 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_1256b785-0e53-467d-9955-ef579bc89d82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2024-11-09 06:08:51,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:08:51,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:08:51,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:08:51,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:08:51,629 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:08:51,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c Unable to find full path for "g++" [2024-11-09 06:08:53,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:08:53,767 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:08:53,768 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-11-09 06:08:53,775 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/data/9ba29a5c1/27a8b94e5ba846ae9ce1e0d4670ba835/FLAG064110362 [2024-11-09 06:08:53,795 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/data/9ba29a5c1/27a8b94e5ba846ae9ce1e0d4670ba835 [2024-11-09 06:08:53,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:08:53,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:08:53,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:08:53,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:08:53,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:08:53,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:08:53" (1/1) ... [2024-11-09 06:08:53,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcf3540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:53, skipping insertion in model container [2024-11-09 06:08:53,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:08:53" (1/1) ... [2024-11-09 06:08:53,833 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:08:53,992 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_1256b785-0e53-467d-9955-ef579bc89d82/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-09 06:08:54,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:08:54,025 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:08:54,035 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_1256b785-0e53-467d-9955-ef579bc89d82/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-09 06:08:54,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:08:54,063 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:08:54,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54 WrapperNode [2024-11-09 06:08:54,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:08:54,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:08:54,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:08:54,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:08:54,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,093 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-09 06:08:54,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:08:54,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:08:54,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:08:54,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:08:54,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,108 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:08:54,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:08:54,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:08:54,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:08:54,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (1/1) ... [2024-11-09 06:08:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:08:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:54,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:08:54,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:08:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:08:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 06:08:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 06:08:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:08:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:08:54,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:08:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:08:54,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:08:54,286 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:08:54,289 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:08:54,477 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 06:08:54,477 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:08:54,510 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:08:54,511 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 06:08:54,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:08:54 BoogieIcfgContainer [2024-11-09 06:08:54,511 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:08:54,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:08:54,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:08:54,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:08:54,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:08:53" (1/3) ... [2024-11-09 06:08:54,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a534cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:08:54, skipping insertion in model container [2024-11-09 06:08:54,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:54" (2/3) ... [2024-11-09 06:08:54,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a534cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:08:54, skipping insertion in model container [2024-11-09 06:08:54,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:08:54" (3/3) ... [2024-11-09 06:08:54,521 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2024-11-09 06:08:54,547 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:08:54,548 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:08:54,636 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:08:54,644 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;@72b14f7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:08:54,645 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:08:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 06:08:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 06:08:54,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:54,680 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:54,681 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:54,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash 931690765, now seen corresponding path program 1 times [2024-11-09 06:08:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224811250] [2024-11-09 06:08:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:08:54,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:54,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224811250] [2024-11-09 06:08:54,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224811250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:08:54,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843864655] [2024-11-09 06:08:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:54,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 06:08:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 06:08:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:08:54,957 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:55,012 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2024-11-09 06:08:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 06:08:55,015 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2024-11-09 06:08:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:55,021 INFO L225 Difference]: With dead ends: 51 [2024-11-09 06:08:55,022 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:08:55,024 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 06:08:55,027 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:55,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:08:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:08:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 06:08:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 06:08:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-09 06:08:55,062 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 20 [2024-11-09 06:08:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:55,064 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-09 06:08:55,064 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-09 06:08:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 06:08:55,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:55,066 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:55,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:08:55,067 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:55,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash 258808021, now seen corresponding path program 1 times [2024-11-09 06:08:55,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:55,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386158804] [2024-11-09 06:08:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:08:55,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386158804] [2024-11-09 06:08:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386158804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:55,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:55,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:08:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024285979] [2024-11-09 06:08:55,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:55,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:08:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:08:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:08:55,293 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:55,431 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2024-11-09 06:08:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:08:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2024-11-09 06:08:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:55,434 INFO L225 Difference]: With dead ends: 47 [2024-11-09 06:08:55,434 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:08:55,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 06:08:55,436 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:55,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 87 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:08:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:08:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-09 06:08:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 06:08:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-11-09 06:08:55,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2024-11-09 06:08:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:55,456 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-11-09 06:08:55,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-11-09 06:08:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:08:55,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:55,458 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:55,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:08:55,459 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:55,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1682213028, now seen corresponding path program 1 times [2024-11-09 06:08:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:55,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073987262] [2024-11-09 06:08:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:55,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:08:55,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353648809] [2024-11-09 06:08:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:55,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:55,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:55,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:55,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:08:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:55,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:08:55,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:08:55,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:08:55,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:55,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073987262] [2024-11-09 06:08:55,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:08:55,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353648809] [2024-11-09 06:08:55,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353648809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:55,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:55,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:08:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349828077] [2024-11-09 06:08:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:55,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:08:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:08:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:08:55,815 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:55,906 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-09 06:08:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:08:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2024-11-09 06:08:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:55,910 INFO L225 Difference]: With dead ends: 46 [2024-11-09 06:08:55,910 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:08:55,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 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 06:08:55,911 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:55,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:08:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:08:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-09 06:08:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:08:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-11-09 06:08:55,950 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 24 [2024-11-09 06:08:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:55,951 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-11-09 06:08:55,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 06:08:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-11-09 06:08:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:08:55,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:55,952 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:55,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:08:56,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:56,153 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:56,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1897574286, now seen corresponding path program 1 times [2024-11-09 06:08:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908550760] [2024-11-09 06:08:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:08:56,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908550760] [2024-11-09 06:08:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908550760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:08:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367470263] [2024-11-09 06:08:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:56,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:56,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:56,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:08:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:56,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:08:56,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:08:56,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:08:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:08:56,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367470263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:08:56,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203975466] [2024-11-09 06:08:56,574 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:08:56,574 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:08:56,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:08:56,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:08:56,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:08:57,736 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:08:57,739 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:08:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1203975466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:58,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:08:58,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7, 7] total 18 [2024-11-09 06:08:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327971972] [2024-11-09 06:08:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:58,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:08:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:08:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2024-11-09 06:08:58,846 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:08:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:59,188 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2024-11-09 06:08:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:08:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-09 06:08:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:59,193 INFO L225 Difference]: With dead ends: 81 [2024-11-09 06:08:59,193 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 06:08:59,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2024-11-09 06:08:59,196 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:59,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:08:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 06:08:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2024-11-09 06:08:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:08:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-11-09 06:08:59,227 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 26 [2024-11-09 06:08:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:59,227 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-11-09 06:08:59,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:08:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-11-09 06:08:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 06:08:59,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:59,229 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 06:08:59,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:08:59,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:59,433 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:59,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash -408375095, now seen corresponding path program 1 times [2024-11-09 06:08:59,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:59,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364846234] [2024-11-09 06:08:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:59,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:08:59,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692928896] [2024-11-09 06:08:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:59,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:59,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:59,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:08:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:59,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:08:59,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:08:59,590 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:08:59,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:59,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364846234] [2024-11-09 06:08:59,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:08:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692928896] [2024-11-09 06:08:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692928896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:59,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:08:59,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689364665] [2024-11-09 06:08:59,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:59,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:08:59,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:59,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:08:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:08:59,593 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:08:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:59,670 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-09 06:08:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:08:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-11-09 06:08:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:59,672 INFO L225 Difference]: With dead ends: 58 [2024-11-09 06:08:59,672 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 06:08:59,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 06:08:59,673 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:59,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:08:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 06:08:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-11-09 06:08:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 06:08:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-11-09 06:08:59,707 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 29 [2024-11-09 06:08:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:59,708 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-11-09 06:08:59,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:08:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-11-09 06:08:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 06:08:59,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:59,709 INFO L215 NwaCegarLoop]: trace histogram [4, 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 06:08:59,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:08:59,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:59,911 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:59,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash 722751463, now seen corresponding path program 1 times [2024-11-09 06:08:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314394005] [2024-11-09 06:08:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:08:59,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430286565] [2024-11-09 06:08:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:59,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:59,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:59,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:09:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:00,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 06:09:00,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:09:00,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:09:00,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314394005] [2024-11-09 06:09:00,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430286565] [2024-11-09 06:09:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430286565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:00,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577304377] [2024-11-09 06:09:00,227 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:09:00,227 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:00,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:00,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:00,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:00,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2024-11-09 06:09:01,036 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:01,038 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1577304377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:09:03,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:09:03,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 6] total 23 [2024-11-09 06:09:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322522928] [2024-11-09 06:09:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:09:03,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 06:09:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 06:09:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:09:03,043 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:09:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:03,590 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2024-11-09 06:09:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:09:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-09 06:09:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:03,593 INFO L225 Difference]: With dead ends: 98 [2024-11-09 06:09:03,593 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 06:09:03,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:09:03,594 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:03,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:09:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 06:09:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2024-11-09 06:09:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.24) internal successors, (62), 53 states have internal predecessors, (62), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 06:09:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2024-11-09 06:09:03,645 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 29 [2024-11-09 06:09:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:03,645 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2024-11-09 06:09:03,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:09:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2024-11-09 06:09:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 06:09:03,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:03,650 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1] [2024-11-09 06:09:03,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:09:03,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:03,851 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:03,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 653099487, now seen corresponding path program 1 times [2024-11-09 06:09:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:03,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51927942] [2024-11-09 06:09:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:03,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828858998] [2024-11-09 06:09:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:03,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:03,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:09:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:03,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:09:03,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:09:04,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:09:06,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51927942] [2024-11-09 06:09:06,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828858998] [2024-11-09 06:09:06,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828858998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254834936] [2024-11-09 06:09:06,438 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:09:06,438 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:06,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:06,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:06,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:11,764 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 06:09:11,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:11,769 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:13,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1953#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:09:13,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:13,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:09:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2024-11-09 06:09:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229220501] [2024-11-09 06:09:13,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:13,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:09:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:09:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:09:13,280 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 06:09:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:17,397 INFO L93 Difference]: Finished difference Result 277 states and 410 transitions. [2024-11-09 06:09:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:09:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 51 [2024-11-09 06:09:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:17,401 INFO L225 Difference]: With dead ends: 277 [2024-11-09 06:09:17,401 INFO L226 Difference]: Without dead ends: 239 [2024-11-09 06:09:17,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=480, Invalid=3180, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:09:17,404 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:17,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 337 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 06:09:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-09 06:09:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 167. [2024-11-09 06:09:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 108 states have internal predecessors, (133), 53 states have call successors, (53), 7 states have call predecessors, (53), 7 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 06:09:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 238 transitions. [2024-11-09 06:09:17,516 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 238 transitions. Word has length 51 [2024-11-09 06:09:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:17,517 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 238 transitions. [2024-11-09 06:09:17,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 06:09:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 238 transitions. [2024-11-09 06:09:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 06:09:17,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:17,519 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 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] [2024-11-09 06:09:17,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:09:17,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:17,724 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:17,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 932274474, now seen corresponding path program 1 times [2024-11-09 06:09:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:17,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827209238] [2024-11-09 06:09:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345142630] [2024-11-09 06:09:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:17,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:17,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:17,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:17,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:09:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:17,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:09:17,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 06:09:17,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:09:18,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827209238] [2024-11-09 06:09:18,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345142630] [2024-11-09 06:09:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345142630] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:09:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 06:09:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404258011] [2024-11-09 06:09:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:09:18,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:09:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:09:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:09:18,033 INFO L87 Difference]: Start difference. First operand 167 states and 238 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 06:09:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:18,236 INFO L93 Difference]: Finished difference Result 181 states and 249 transitions. [2024-11-09 06:09:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:09:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 61 [2024-11-09 06:09:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:18,240 INFO L225 Difference]: With dead ends: 181 [2024-11-09 06:09:18,240 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 06:09:18,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:09:18,241 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:18,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:09:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 06:09:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-09 06:09:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 117 states have internal predecessors, (142), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 06:09:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 247 transitions. [2024-11-09 06:09:18,415 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 247 transitions. Word has length 61 [2024-11-09 06:09:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:18,415 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 247 transitions. [2024-11-09 06:09:18,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 06:09:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 247 transitions. [2024-11-09 06:09:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 06:09:18,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:18,418 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2024-11-09 06:09:18,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:09:18,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:18,623 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:18,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -341181603, now seen corresponding path program 1 times [2024-11-09 06:09:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754903356] [2024-11-09 06:09:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:18,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166102313] [2024-11-09 06:09:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:18,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:18,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:18,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:09:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:18,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 06:09:18,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:09:19,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:09:19,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754903356] [2024-11-09 06:09:19,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166102313] [2024-11-09 06:09:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166102313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526186055] [2024-11-09 06:09:19,567 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:09:19,568 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:19,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:19,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:19,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:23,512 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:09:23,517 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:23,518 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:24,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4043#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:09:24,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:24,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:09:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-09 06:09:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033398099] [2024-11-09 06:09:24,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:24,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:09:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:09:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:09:24,439 INFO L87 Difference]: Start difference. First operand 179 states and 247 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-09 06:09:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:28,754 INFO L93 Difference]: Finished difference Result 295 states and 399 transitions. [2024-11-09 06:09:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:09:28,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 59 [2024-11-09 06:09:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:28,757 INFO L225 Difference]: With dead ends: 295 [2024-11-09 06:09:28,757 INFO L226 Difference]: Without dead ends: 239 [2024-11-09 06:09:28,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=313, Invalid=2657, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:09:28,760 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:28,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 563 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:09:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-09 06:09:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 200. [2024-11-09 06:09:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 133 states have (on average 1.218045112781955) internal successors, (162), 137 states have internal predecessors, (162), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 06:09:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 267 transitions. [2024-11-09 06:09:28,883 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 267 transitions. Word has length 59 [2024-11-09 06:09:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:28,883 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 267 transitions. [2024-11-09 06:09:28,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-11-09 06:09:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 267 transitions. [2024-11-09 06:09:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 06:09:28,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:28,885 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2024-11-09 06:09:28,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:09:29,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:29,086 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:29,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1631056143, now seen corresponding path program 2 times [2024-11-09 06:09:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190711220] [2024-11-09 06:09:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:09:29,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190711220] [2024-11-09 06:09:29,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190711220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314544673] [2024-11-09 06:09:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:09:29,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:29,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:29,232 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:29,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:09:29,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:09:29,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:29,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 06:09:29,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 06:09:29,307 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:09:29,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314544673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:09:29,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:09:29,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2024-11-09 06:09:29,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241844324] [2024-11-09 06:09:29,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:09:29,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:09:29,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:09:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:09:29,310 INFO L87 Difference]: Start difference. First operand 200 states and 267 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-09 06:09:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:29,514 INFO L93 Difference]: Finished difference Result 259 states and 348 transitions. [2024-11-09 06:09:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:09:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 59 [2024-11-09 06:09:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:29,517 INFO L225 Difference]: With dead ends: 259 [2024-11-09 06:09:29,517 INFO L226 Difference]: Without dead ends: 203 [2024-11-09 06:09:29,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:09:29,518 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:29,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 143 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:09:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-09 06:09:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2024-11-09 06:09:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 123 states have internal predecessors, (144), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-09 06:09:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 245 transitions. [2024-11-09 06:09:29,615 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 245 transitions. Word has length 59 [2024-11-09 06:09:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:29,616 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 245 transitions. [2024-11-09 06:09:29,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-09 06:09:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 245 transitions. [2024-11-09 06:09:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 06:09:29,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:29,618 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:29,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:29,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:09:29,819 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:29,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1316421070, now seen corresponding path program 3 times [2024-11-09 06:09:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243427108] [2024-11-09 06:09:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-09 06:09:29,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243427108] [2024-11-09 06:09:29,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243427108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:09:29,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:09:29,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:09:29,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705921512] [2024-11-09 06:09:29,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:09:29,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:09:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:09:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:09:29,910 INFO L87 Difference]: Start difference. First operand 186 states and 245 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 06:09:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:30,068 INFO L93 Difference]: Finished difference Result 314 states and 424 transitions. [2024-11-09 06:09:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:09:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-11-09 06:09:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:30,071 INFO L225 Difference]: With dead ends: 314 [2024-11-09 06:09:30,071 INFO L226 Difference]: Without dead ends: 222 [2024-11-09 06:09:30,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 06:09:30,072 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:30,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:09:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-09 06:09:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2024-11-09 06:09:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 67 states have call successors, (67), 13 states have call predecessors, (67), 13 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-09 06:09:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 289 transitions. [2024-11-09 06:09:30,190 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 289 transitions. Word has length 64 [2024-11-09 06:09:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:30,191 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 289 transitions. [2024-11-09 06:09:30,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 06:09:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 289 transitions. [2024-11-09 06:09:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 06:09:30,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:30,192 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:30,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:09:30,193 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:30,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1186596538, now seen corresponding path program 4 times [2024-11-09 06:09:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:30,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331955472] [2024-11-09 06:09:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:30,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23970979] [2024-11-09 06:09:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:09:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:30,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:30,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:30,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:09:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:30,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:09:30,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-09 06:09:30,335 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:09:30,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331955472] [2024-11-09 06:09:30,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23970979] [2024-11-09 06:09:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23970979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:09:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:09:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:09:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31787228] [2024-11-09 06:09:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:09:30,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:09:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:09:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:09:30,338 INFO L87 Difference]: Start difference. First operand 213 states and 289 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 06:09:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:30,533 INFO L93 Difference]: Finished difference Result 243 states and 330 transitions. [2024-11-09 06:09:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:09:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2024-11-09 06:09:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:30,536 INFO L225 Difference]: With dead ends: 243 [2024-11-09 06:09:30,536 INFO L226 Difference]: Without dead ends: 241 [2024-11-09 06:09:30,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 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 06:09:30,537 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:30,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 105 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:09:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-09 06:09:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 236. [2024-11-09 06:09:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 144 states have internal predecessors, (170), 77 states have call successors, (77), 15 states have call predecessors, (77), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-09 06:09:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 323 transitions. [2024-11-09 06:09:30,665 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 323 transitions. Word has length 64 [2024-11-09 06:09:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:30,665 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 323 transitions. [2024-11-09 06:09:30,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 06:09:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 323 transitions. [2024-11-09 06:09:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 06:09:30,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:30,666 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 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 06:09:30,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:30,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:09:30,867 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:30,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -74774096, now seen corresponding path program 5 times [2024-11-09 06:09:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565377099] [2024-11-09 06:09:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:30,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696912444] [2024-11-09 06:09:30,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:09:30,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:30,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:30,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:30,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:09:30,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:09:30,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:30,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 06:09:30,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 06:09:32,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:34,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565377099] [2024-11-09 06:09:34,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696912444] [2024-11-09 06:09:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696912444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746708503] [2024-11-09 06:09:34,010 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:09:34,010 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:34,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:34,011 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:34,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:37,572 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:09:37,576 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:37,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:39,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7871#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:09:39,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:39,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:09:39,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 06:09:39,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910898477] [2024-11-09 06:09:39,138 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:39,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:09:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:09:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:09:39,140 INFO L87 Difference]: Start difference. First operand 236 states and 323 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-09 06:09:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:40,185 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2024-11-09 06:09:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:09:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2024-11-09 06:09:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:40,187 INFO L225 Difference]: With dead ends: 296 [2024-11-09 06:09:40,187 INFO L226 Difference]: Without dead ends: 294 [2024-11-09 06:09:40,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:09:40,189 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 71 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:40,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:09:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-09 06:09:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2024-11-09 06:09:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 169 states have internal predecessors, (200), 93 states have call successors, (93), 17 states have call predecessors, (93), 17 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 06:09:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 385 transitions. [2024-11-09 06:09:40,399 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 385 transitions. Word has length 64 [2024-11-09 06:09:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:40,399 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 385 transitions. [2024-11-09 06:09:40,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-09 06:09:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 385 transitions. [2024-11-09 06:09:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 06:09:40,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:40,401 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:40,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:40,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:09:40,603 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:40,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash -849799363, now seen corresponding path program 1 times [2024-11-09 06:09:40,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:40,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592742396] [2024-11-09 06:09:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:40,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584055589] [2024-11-09 06:09:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:40,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:40,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:40,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:09:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:40,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-09 06:09:40,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 06:09:42,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:44,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592742396] [2024-11-09 06:09:44,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584055589] [2024-11-09 06:09:44,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584055589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636938064] [2024-11-09 06:09:44,263 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:09:44,263 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:44,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:44,264 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:44,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:46,710 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 06:09:46,712 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:46,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:49,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9156#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:09:49,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:49,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:09:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 06:09:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21505918] [2024-11-09 06:09:49,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:49,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:09:49,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:09:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:09:49,081 INFO L87 Difference]: Start difference. First operand 279 states and 385 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 06:09:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:50,479 INFO L93 Difference]: Finished difference Result 364 states and 505 transitions. [2024-11-09 06:09:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 06:09:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 78 [2024-11-09 06:09:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:50,483 INFO L225 Difference]: With dead ends: 364 [2024-11-09 06:09:50,483 INFO L226 Difference]: Without dead ends: 357 [2024-11-09 06:09:50,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 06:09:50,484 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:50,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 331 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:09:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-11-09 06:09:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 340. [2024-11-09 06:09:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 199 states have (on average 1.2060301507537687) internal successors, (240), 200 states have internal predecessors, (240), 121 states have call successors, (121), 19 states have call predecessors, (121), 19 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2024-11-09 06:09:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 481 transitions. [2024-11-09 06:09:50,746 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 481 transitions. Word has length 78 [2024-11-09 06:09:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:50,747 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 481 transitions. [2024-11-09 06:09:50,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 06:09:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 481 transitions. [2024-11-09 06:09:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:09:50,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:50,748 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 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, 1] [2024-11-09 06:09:50,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:50,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:09:50,949 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:50,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash 609785138, now seen corresponding path program 1 times [2024-11-09 06:09:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837886322] [2024-11-09 06:09:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:50,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012477713] [2024-11-09 06:09:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:50,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:50,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:50,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:50,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:09:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:51,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 06:09:51,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-09 06:09:51,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-09 06:09:51,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837886322] [2024-11-09 06:09:51,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:09:51,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012477713] [2024-11-09 06:09:51,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012477713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:51,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524301446] [2024-11-09 06:09:51,970 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:09:51,971 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:51,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:51,971 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:51,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:53,553 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:09:53,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:09:53,558 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:54,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10839#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:09:54,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:54,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:09:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-09 06:09:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118062931] [2024-11-09 06:09:54,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:54,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:09:54,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:09:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:09:54,479 INFO L87 Difference]: Start difference. First operand 340 states and 481 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-09 06:09:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:57,031 INFO L93 Difference]: Finished difference Result 763 states and 1192 transitions. [2024-11-09 06:09:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:09:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 81 [2024-11-09 06:09:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:57,036 INFO L225 Difference]: With dead ends: 763 [2024-11-09 06:09:57,036 INFO L226 Difference]: Without dead ends: 761 [2024-11-09 06:09:57,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:09:57,038 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:57,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 367 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:09:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2024-11-09 06:09:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 714. [2024-11-09 06:09:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 347 states have (on average 1.30835734870317) internal successors, (454), 348 states have internal predecessors, (454), 345 states have call successors, (345), 21 states have call predecessors, (345), 21 states have return successors, (344), 344 states have call predecessors, (344), 344 states have call successors, (344) [2024-11-09 06:09:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1143 transitions. [2024-11-09 06:09:57,656 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1143 transitions. Word has length 81 [2024-11-09 06:09:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:57,656 INFO L471 AbstractCegarLoop]: Abstraction has 714 states and 1143 transitions. [2024-11-09 06:09:57,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-09 06:09:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1143 transitions. [2024-11-09 06:09:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:09:57,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:57,658 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 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] [2024-11-09 06:09:57,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:57,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:09:57,858 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:09:57,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash -781410028, now seen corresponding path program 1 times [2024-11-09 06:09:57,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:57,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661069916] [2024-11-09 06:09:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:57,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:09:57,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601561136] [2024-11-09 06:09:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:57,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:57,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:57,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:09:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:57,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 06:09:57,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-09 06:09:58,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-09 06:10:03,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661069916] [2024-11-09 06:10:03,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:10:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601561136] [2024-11-09 06:10:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601561136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078589932] [2024-11-09 06:10:03,704 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:10:03,704 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:03,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:03,705 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:03,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:06,022 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 06:10:06,025 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:10:06,026 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:08,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13897#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:10:08,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:08,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:10:08,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2024-11-09 06:10:08,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009374050] [2024-11-09 06:10:08,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:08,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:10:08,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:10:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 06:10:08,432 INFO L87 Difference]: Start difference. First operand 714 states and 1143 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2024-11-09 06:10:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:20,308 INFO L93 Difference]: Finished difference Result 996 states and 1578 transitions. [2024-11-09 06:10:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:10:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 81 [2024-11-09 06:10:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:20,315 INFO L225 Difference]: With dead ends: 996 [2024-11-09 06:10:20,315 INFO L226 Difference]: Without dead ends: 994 [2024-11-09 06:10:20,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=809, Invalid=5197, Unknown=0, NotChecked=0, Total=6006 [2024-11-09 06:10:20,318 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 168 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:20,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 652 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 06:10:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2024-11-09 06:10:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 862. [2024-11-09 06:10:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 425 states have (on average 1.3035294117647058) internal successors, (554), 426 states have internal predecessors, (554), 409 states have call successors, (409), 27 states have call predecessors, (409), 27 states have return successors, (408), 408 states have call predecessors, (408), 408 states have call successors, (408) [2024-11-09 06:10:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1371 transitions. [2024-11-09 06:10:21,428 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1371 transitions. Word has length 81 [2024-11-09 06:10:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:21,429 INFO L471 AbstractCegarLoop]: Abstraction has 862 states and 1371 transitions. [2024-11-09 06:10:21,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2024-11-09 06:10:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1371 transitions. [2024-11-09 06:10:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 06:10:21,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:21,431 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:21,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:10:21,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:10:21,632 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:10:21,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1153377158, now seen corresponding path program 2 times [2024-11-09 06:10:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370322721] [2024-11-09 06:10:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-09 06:10:21,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:21,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370322721] [2024-11-09 06:10:21,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370322721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:21,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799065959] [2024-11-09 06:10:21,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:10:21,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:21,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:10:22,025 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:10:22,025 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:22,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:10:22,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-09 06:10:22,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-09 06:10:22,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799065959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132361842] [2024-11-09 06:10:22,219 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:10:22,220 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:22,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:22,220 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:22,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:25,760 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:10:25,765 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:10:25,767 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:26,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17675#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:10:26,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:26,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:26,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 10 [2024-11-09 06:10:26,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032897739] [2024-11-09 06:10:26,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:26,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:10:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:10:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:10:26,718 INFO L87 Difference]: Start difference. First operand 862 states and 1371 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 4 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 06:10:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:28,477 INFO L93 Difference]: Finished difference Result 1001 states and 1588 transitions. [2024-11-09 06:10:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:10:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 4 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 86 [2024-11-09 06:10:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:28,484 INFO L225 Difference]: With dead ends: 1001 [2024-11-09 06:10:28,484 INFO L226 Difference]: Without dead ends: 994 [2024-11-09 06:10:28,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:10:28,486 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:28,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:10:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2024-11-09 06:10:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 831. [2024-11-09 06:10:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 402 states have (on average 1.3109452736318408) internal successors, (527), 403 states have internal predecessors, (527), 401 states have call successors, (401), 27 states have call predecessors, (401), 27 states have return successors, (400), 400 states have call predecessors, (400), 400 states have call successors, (400) [2024-11-09 06:10:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1328 transitions. [2024-11-09 06:10:29,503 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1328 transitions. Word has length 86 [2024-11-09 06:10:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:29,504 INFO L471 AbstractCegarLoop]: Abstraction has 831 states and 1328 transitions. [2024-11-09 06:10:29,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 4 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 06:10:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1328 transitions. [2024-11-09 06:10:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 06:10:29,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:29,507 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:29,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:10:29,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:29,708 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:10:29,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 307216733, now seen corresponding path program 6 times [2024-11-09 06:10:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:29,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625315923] [2024-11-09 06:10:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:10:29,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866415805] [2024-11-09 06:10:29,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:10:29,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:29,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:29,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:10:29,828 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:10:29,828 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:29,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:10:29,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-09 06:10:31,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-09 06:10:34,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625315923] [2024-11-09 06:10:34,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:10:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866415805] [2024-11-09 06:10:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866415805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147037087] [2024-11-09 06:10:34,699 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 06:10:34,699 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:34,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:34,700 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:34,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:37,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:10:37,871 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:10:37,872 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:39,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21411#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:10:39,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:39,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:10:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-09 06:10:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726194413] [2024-11-09 06:10:39,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:39,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 06:10:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 06:10:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:10:39,981 INFO L87 Difference]: Start difference. First operand 831 states and 1328 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-09 06:10:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:59,433 INFO L93 Difference]: Finished difference Result 1204 states and 1914 transitions. [2024-11-09 06:10:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:10:59,434 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 89 [2024-11-09 06:10:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:59,442 INFO L225 Difference]: With dead ends: 1204 [2024-11-09 06:10:59,442 INFO L226 Difference]: Without dead ends: 1202 [2024-11-09 06:10:59,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=774, Invalid=5077, Unknown=1, NotChecked=0, Total=5852 [2024-11-09 06:10:59,445 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 201 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:59,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 511 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 06:10:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2024-11-09 06:11:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 974. [2024-11-09 06:11:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 480 states have (on average 1.3) internal successors, (624), 482 states have internal predecessors, (624), 459 states have call successors, (459), 34 states have call predecessors, (459), 34 states have return successors, (458), 457 states have call predecessors, (458), 458 states have call successors, (458) [2024-11-09 06:11:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1541 transitions. [2024-11-09 06:11:00,735 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1541 transitions. Word has length 89 [2024-11-09 06:11:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:00,738 INFO L471 AbstractCegarLoop]: Abstraction has 974 states and 1541 transitions. [2024-11-09 06:11:00,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-09 06:11:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1541 transitions. [2024-11-09 06:11:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 06:11:00,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:00,740 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 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, 1] [2024-11-09 06:11:00,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:11:00,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:11:00,945 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:11:00,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -891555935, now seen corresponding path program 2 times [2024-11-09 06:11:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:00,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503323972] [2024-11-09 06:11:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:11:00,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292242988] [2024-11-09 06:11:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:11:00,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:00,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:00,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:11:01,090 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:11:01,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:11:01,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 06:11:01,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 58 proven. 5 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2024-11-09 06:11:01,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:02,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503323972] [2024-11-09 06:11:02,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:11:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292242988] [2024-11-09 06:11:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292242988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:11:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207076960] [2024-11-09 06:11:02,545 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:11:02,545 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:02,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:02,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:02,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:04,626 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:11:04,633 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:11:04,634 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:07,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25548#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:11:07,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:07,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:11:07,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-09 06:11:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697998058] [2024-11-09 06:11:07,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:07,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:11:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:11:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:11:07,285 INFO L87 Difference]: Start difference. First operand 974 states and 1541 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 06:11:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:09,578 INFO L93 Difference]: Finished difference Result 1236 states and 1952 transitions. [2024-11-09 06:11:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:11:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2024-11-09 06:11:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:09,587 INFO L225 Difference]: With dead ends: 1236 [2024-11-09 06:11:09,588 INFO L226 Difference]: Without dead ends: 1229 [2024-11-09 06:11:09,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:11:09,590 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:09,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 216 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:11:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2024-11-09 06:11:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1212. [2024-11-09 06:11:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 593 states have (on average 1.3052276559865092) internal successors, (774), 597 states have internal predecessors, (774), 577 states have call successors, (577), 41 states have call predecessors, (577), 41 states have return successors, (576), 573 states have call predecessors, (576), 576 states have call successors, (576) [2024-11-09 06:11:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1927 transitions. [2024-11-09 06:11:11,227 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1927 transitions. Word has length 95 [2024-11-09 06:11:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:11,228 INFO L471 AbstractCegarLoop]: Abstraction has 1212 states and 1927 transitions. [2024-11-09 06:11:11,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 06:11:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1927 transitions. [2024-11-09 06:11:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 06:11:11,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:11,230 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 06:11:11,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:11:11,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:11,435 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:11:11,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash -879153679, now seen corresponding path program 3 times [2024-11-09 06:11:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:11,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415414726] [2024-11-09 06:11:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:11:11,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85026716] [2024-11-09 06:11:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:11:11,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:11,461 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:11,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:11:11,549 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:11:11,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:11:11,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 06:11:11,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2024-11-09 06:11:12,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 06:11:15,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415414726] [2024-11-09 06:11:15,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:11:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85026716] [2024-11-09 06:11:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85026716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145043145] [2024-11-09 06:11:15,813 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:11:15,813 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:15,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:15,814 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:15,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:17,721 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:11:17,726 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:11:17,728 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:20,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30376#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:11:20,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:20,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:11:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2024-11-09 06:11:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383421667] [2024-11-09 06:11:20,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:20,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:11:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:11:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 06:11:20,431 INFO L87 Difference]: Start difference. First operand 1212 states and 1927 transitions. Second operand has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-09 06:11:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:44,586 INFO L93 Difference]: Finished difference Result 2042 states and 3232 transitions. [2024-11-09 06:11:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 06:11:44,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) Word has length 98 [2024-11-09 06:11:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:44,595 INFO L225 Difference]: With dead ends: 2042 [2024-11-09 06:11:44,596 INFO L226 Difference]: Without dead ends: 1490 [2024-11-09 06:11:44,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1593, Invalid=9749, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 06:11:44,601 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 274 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:44,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 653 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 06:11:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-11-09 06:11:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1343. [2024-11-09 06:11:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 656 states have (on average 1.3033536585365855) internal successors, (855), 660 states have internal predecessors, (855), 641 states have call successors, (641), 45 states have call predecessors, (641), 45 states have return successors, (640), 637 states have call predecessors, (640), 640 states have call successors, (640) [2024-11-09 06:11:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2136 transitions. [2024-11-09 06:11:46,447 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2136 transitions. Word has length 98 [2024-11-09 06:11:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:46,448 INFO L471 AbstractCegarLoop]: Abstraction has 1343 states and 2136 transitions. [2024-11-09 06:11:46,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-09 06:11:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2136 transitions. [2024-11-09 06:11:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-09 06:11:46,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:46,450 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:46,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:46,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:46,655 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:11:46,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1319919874, now seen corresponding path program 4 times [2024-11-09 06:11:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225762880] [2024-11-09 06:11:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:11:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345867062] [2024-11-09 06:11:46,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:11:46,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:46,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:46,678 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1256b785-0e53-467d-9955-ef579bc89d82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:11:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:46,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 06:11:46,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:11:48,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 26 proven. 62 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-09 06:11:54,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225762880] [2024-11-09 06:11:54,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:11:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345867062] [2024-11-09 06:11:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345867062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598958915] [2024-11-09 06:11:54,644 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 06:11:54,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:54,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:54,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:54,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:56,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2024-11-09 06:11:56,703 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-09 06:11:56,704 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:12:00,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36932#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 06:12:00,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:12:00,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:12:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-11-09 06:12:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913195457] [2024-11-09 06:12:00,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:12:00,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:12:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:12:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:12:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2436, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 06:12:00,605 INFO L87 Difference]: Start difference. First operand 1343 states and 2136 transitions. Second operand has 34 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 12 states have call successors, (31), 3 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 06:12:44,191 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 [1] [2024-11-09 06:12:47,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:12:49,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:12:52,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:22,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:25,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:27,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:28,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:31,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:32,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:34,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:36,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:38,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:50,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:52,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:54,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:13:56,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:16,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:18,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:20,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:35,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:46,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:48,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:14:50,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:03,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:17,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:21,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:25,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:27,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:15:31,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 06:15:52,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:17,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:21,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:23,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:25,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:28,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:16:30,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:17:15,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:17:32,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:07,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:13,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:15,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:17,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:19,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:22,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:23,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:25,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:39,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:18:41,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:09,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:11,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:12,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:14,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:16,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:19,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:24,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:19:59,910 WARN L286 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:20:27,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:34,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:42,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:46,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:48,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:50,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:52,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:20:55,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:01,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:03,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:05,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:07,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:27,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:28,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:30,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-09 06:21:42,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]