./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E --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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:08:11,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:08:11,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:08:11,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:08:11,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:08:11,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:08:11,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:08:11,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:08:11,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:08:11,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:08:11,476 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:08:11,476 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:08:11,477 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:08:11,477 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:08:11,477 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:08:11,477 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:08:11,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:08:11,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:08:11,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:08:11,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:08:11,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:08:11,478 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:08:11,479 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:08:11,480 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:08:11,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:08:11,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:08:11,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:08:11,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:08:11,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:08:11,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:08:11,481 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E 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 -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2024-11-14 04:08:11,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:08:11,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:08:11,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:08:11,819 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:08:11,821 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:08:11,823 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c Unable to find full path for "g++" [2024-11-14 04:08:13,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:08:14,032 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:08:14,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2024-11-14 04:08:14,046 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/data/7f83dc3c6/7c4ec643cd124471a1d95b76d8b5b22f/FLAG9c9ea5232 [2024-11-14 04:08:14,063 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/data/7f83dc3c6/7c4ec643cd124471a1d95b76d8b5b22f [2024-11-14 04:08:14,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:08:14,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:08:14,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:08:14,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:08:14,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:08:14,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bd0770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14, skipping insertion in model container [2024-11-14 04:08:14,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,088 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:08:14,236 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_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2024-11-14 04:08:14,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:08:14,279 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:08:14,290 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_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2024-11-14 04:08:14,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:08:14,311 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:08:14,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14 WrapperNode [2024-11-14 04:08:14,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:08:14,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:08:14,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:08:14,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:08:14,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,355 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-14 04:08:14,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:08:14,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:08:14,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:08:14,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:08:14,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,388 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:08:14,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:08:14,394 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:08:14,394 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:08:14,395 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (1/1) ... [2024-11-14 04:08:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:08:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:14,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:08:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:08:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:08:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:08:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:08:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:08:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:08:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:08:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 04:08:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 04:08:14,521 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:08:14,523 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:08:14,742 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 04:08:14,742 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:08:14,806 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:08:14,807 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:08:14,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:08:14 BoogieIcfgContainer [2024-11-14 04:08:14,807 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:08:14,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:08:14,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:08:14,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:08:14,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:08:14" (1/3) ... [2024-11-14 04:08:14,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d23ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:08:14, skipping insertion in model container [2024-11-14 04:08:14,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:08:14" (2/3) ... [2024-11-14 04:08:14,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d23ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:08:14, skipping insertion in model container [2024-11-14 04:08:14,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:08:14" (3/3) ... [2024-11-14 04:08:14,823 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2024-11-14 04:08:14,840 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:08:14,843 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_valuebound5.c that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:08:14,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:08:14,929 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;@388bc3c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:08:14,929 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:08:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 04:08:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:08:14,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:14,944 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:14,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:14,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash -844036563, now seen corresponding path program 1 times [2024-11-14 04:08:14,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:14,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240545447] [2024-11-14 04:08:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:14,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:08:15,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:15,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240545447] [2024-11-14 04:08:15,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240545447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:15,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:15,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:08:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186170438] [2024-11-14 04:08:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:15,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:08:15,413 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 04:08:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:15,538 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2024-11-14 04:08:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-11-14 04:08:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:15,552 INFO L225 Difference]: With dead ends: 57 [2024-11-14 04:08:15,553 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:08:15,556 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 [2024-11-14 04:08:15,559 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:15,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:08:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-14 04:08:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 04:08:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-14 04:08:15,603 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-11-14 04:08:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:15,605 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-14 04:08:15,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 04:08:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-14 04:08:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:08:15,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:15,607 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:15,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:08:15,607 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:15,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1199674348, now seen corresponding path program 1 times [2024-11-14 04:08:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089114247] [2024-11-14 04:08:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:08:15,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:15,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089114247] [2024-11-14 04:08:15,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089114247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:15,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:15,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:08:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987684584] [2024-11-14 04:08:15,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:15,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:08:15,829 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:08:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:15,947 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-14 04:08:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2024-11-14 04:08:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:15,951 INFO L225 Difference]: With dead ends: 41 [2024-11-14 04:08:15,951 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 04:08:15,952 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 [2024-11-14 04:08:15,953 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:15,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 04:08:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-14 04:08:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 04:08:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-14 04:08:15,970 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-11-14 04:08:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:15,970 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-14 04:08:15,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:08:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-14 04:08:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:08:15,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:15,971 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:15,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:08:15,974 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:15,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1771353677, now seen corresponding path program 1 times [2024-11-14 04:08:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350581434] [2024-11-14 04:08:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644652189] [2024-11-14 04:08:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:16,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:16,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:16,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:08:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:16,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:08:16,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:08:16,257 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:08:16,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:16,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350581434] [2024-11-14 04:08:16,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644652189] [2024-11-14 04:08:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644652189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:16,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:08:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507915354] [2024-11-14 04:08:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:16,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:08:16,263 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-14 04:08:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:16,401 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 04:08:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 27 [2024-11-14 04:08:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:16,403 INFO L225 Difference]: With dead ends: 58 [2024-11-14 04:08:16,405 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 04:08:16,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:08:16,406 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:16,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 04:08:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-14 04:08:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-14 04:08:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-14 04:08:16,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2024-11-14 04:08:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:16,436 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-14 04:08:16,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-14 04:08:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-14 04:08:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:08:16,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:16,437 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:16,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:08:16,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:16,638 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:16,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1804579360, now seen corresponding path program 1 times [2024-11-14 04:08:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721540683] [2024-11-14 04:08:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:16,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582766560] [2024-11-14 04:08:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:16,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:16,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:08:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:16,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:08:16,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:08:16,885 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:08:16,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721540683] [2024-11-14 04:08:16,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582766560] [2024-11-14 04:08:16,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582766560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:16,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:16,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:08:16,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249759901] [2024-11-14 04:08:16,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:16,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:08:16,887 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:08:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:16,988 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-14 04:08:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2024-11-14 04:08:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:16,992 INFO L225 Difference]: With dead ends: 58 [2024-11-14 04:08:16,992 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 04:08:16,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:08:16,993 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:16,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 04:08:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-14 04:08:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 04:08:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2024-11-14 04:08:17,019 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 34 [2024-11-14 04:08:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:17,020 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2024-11-14 04:08:17,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:08:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2024-11-14 04:08:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:08:17,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:17,022 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:17,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:08:17,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:17,223 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:17,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389582, now seen corresponding path program 1 times [2024-11-14 04:08:17,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:17,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731400588] [2024-11-14 04:08:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905906060] [2024-11-14 04:08:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:17,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:17,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:08:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:17,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:08:17,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 04:08:17,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:08:17,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731400588] [2024-11-14 04:08:17,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905906060] [2024-11-14 04:08:17,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905906060] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:17,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:08:17,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-14 04:08:17,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7608483] [2024-11-14 04:08:17,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:17,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:08:17,608 INFO L87 Difference]: Start difference. First operand 55 states and 70 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:08:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:17,717 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-14 04:08:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:17,718 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-11-14 04:08:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:17,723 INFO L225 Difference]: With dead ends: 61 [2024-11-14 04:08:17,724 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 04:08:17,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:08:17,725 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:17,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 04:08:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-14 04:08:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 04:08:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2024-11-14 04:08:17,754 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 44 [2024-11-14 04:08:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:17,755 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2024-11-14 04:08:17,755 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:08:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2024-11-14 04:08:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:08:17,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:17,756 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:17,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:08:17,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:17,961 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:17,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 71620237, now seen corresponding path program 1 times [2024-11-14 04:08:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:17,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195397750] [2024-11-14 04:08:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 04:08:18,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:18,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195397750] [2024-11-14 04:08:18,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195397750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:18,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:18,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:08:18,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011539240] [2024-11-14 04:08:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:18,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:18,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:08:18,162 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 04:08:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:18,248 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-11-14 04:08:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2024-11-14 04:08:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:18,250 INFO L225 Difference]: With dead ends: 67 [2024-11-14 04:08:18,250 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:08:18,250 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 [2024-11-14 04:08:18,251 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:18,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 106 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:08:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:08:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-14 04:08:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 04:08:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-14 04:08:18,275 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 50 [2024-11-14 04:08:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:18,280 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-14 04:08:18,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-14 04:08:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-14 04:08:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:08:18,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:18,281 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-11-14 04:08:18,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:08:18,282 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:18,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash 143268858, now seen corresponding path program 1 times [2024-11-14 04:08:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:18,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663666801] [2024-11-14 04:08:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:18,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059207624] [2024-11-14 04:08:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:18,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:08:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:18,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 04:08:18,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-14 04:08:19,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-14 04:08:22,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663666801] [2024-11-14 04:08:22,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059207624] [2024-11-14 04:08:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059207624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141346054] [2024-11-14 04:08:22,538 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 04:08:22,538 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:22,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:22,546 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:22,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:25,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:08:25,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:08:25,406 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:26,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:08:26,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:26,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:08:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-14 04:08:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392087895] [2024-11-14 04:08:26,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:26,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:08:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:08:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:08:26,535 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-14 04:08:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:27,796 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-11-14 04:08:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:08:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-11-14 04:08:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:27,798 INFO L225 Difference]: With dead ends: 110 [2024-11-14 04:08:27,798 INFO L226 Difference]: Without dead ends: 98 [2024-11-14 04:08:27,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:08:27,800 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:27,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 244 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:08:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-14 04:08:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2024-11-14 04:08:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 54 states have internal predecessors, (56), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 04:08:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-14 04:08:27,838 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 63 [2024-11-14 04:08:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:27,838 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-14 04:08:27,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-14 04:08:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-14 04:08:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 04:08:27,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:27,840 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 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] [2024-11-14 04:08:27,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:08:28,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:28,042 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:28,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1858914905, now seen corresponding path program 2 times [2024-11-14 04:08:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365249345] [2024-11-14 04:08:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:28,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045119827] [2024-11-14 04:08:28,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:08:28,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:28,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:28,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:08:28,158 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:08:28,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:08:28,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:08:28,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-14 04:08:28,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-14 04:08:29,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365249345] [2024-11-14 04:08:29,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045119827] [2024-11-14 04:08:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045119827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221438318] [2024-11-14 04:08:29,853 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 04:08:29,853 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:29,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:29,854 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:29,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:31,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:08:31,760 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:08:31,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:32,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2662#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:08:32,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:32,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:08:32,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-14 04:08:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065542254] [2024-11-14 04:08:32,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:32,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:08:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:08:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:08:32,719 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-14 04:08:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:33,177 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-14 04:08:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:08:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 68 [2024-11-14 04:08:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:33,179 INFO L225 Difference]: With dead ends: 107 [2024-11-14 04:08:33,179 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 04:08:33,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:08:33,181 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:33,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 159 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:08:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 04:08:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-14 04:08:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-14 04:08:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2024-11-14 04:08:33,208 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 68 [2024-11-14 04:08:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:33,208 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2024-11-14 04:08:33,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-14 04:08:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2024-11-14 04:08:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:08:33,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:33,210 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-11-14 04:08:33,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:08:33,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:33,415 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:33,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1998790778, now seen corresponding path program 1 times [2024-11-14 04:08:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247519448] [2024-11-14 04:08:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:33,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497788528] [2024-11-14 04:08:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:33,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:33,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:33,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:33,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:08:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:33,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 04:08:33,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-14 04:08:33,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-14 04:08:34,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247519448] [2024-11-14 04:08:34,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497788528] [2024-11-14 04:08:34,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497788528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453044042] [2024-11-14 04:08:34,857 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 04:08:34,857 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:34,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:34,858 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:34,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:36,884 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:08:36,887 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:08:36,888 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:37,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3463#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:08:37,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:37,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:08:37,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-14 04:08:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023893402] [2024-11-14 04:08:37,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:37,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:08:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:08:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:08:37,699 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-14 04:08:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:37,997 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2024-11-14 04:08:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:08:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 74 [2024-11-14 04:08:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:37,999 INFO L225 Difference]: With dead ends: 105 [2024-11-14 04:08:37,999 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 04:08:38,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 04:08:38,000 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:38,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 229 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:08:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 04:08:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2024-11-14 04:08:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-14 04:08:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2024-11-14 04:08:38,029 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 74 [2024-11-14 04:08:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:38,030 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2024-11-14 04:08:38,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 12 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-14 04:08:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2024-11-14 04:08:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 04:08:38,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:38,032 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-11-14 04:08:38,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:08:38,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:08:38,236 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:38,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash 138621095, now seen corresponding path program 1 times [2024-11-14 04:08:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:38,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221779195] [2024-11-14 04:08:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-14 04:08:38,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221779195] [2024-11-14 04:08:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221779195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165188469] [2024-11-14 04:08:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:38,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:38,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:38,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:08:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:38,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:08:38,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:08:39,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:08:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165188469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190426017] [2024-11-14 04:08:39,567 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 04:08:39,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:39,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:39,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:39,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:40,843 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:08:40,848 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:08:40,849 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:41,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4289#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:08:41,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:41,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:08:41,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-11-14 04:08:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064642397] [2024-11-14 04:08:41,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:41,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:08:41,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:08:41,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 04:08:41,615 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-14 04:08:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:41,936 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2024-11-14 04:08:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:08:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 79 [2024-11-14 04:08:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:41,938 INFO L225 Difference]: With dead ends: 110 [2024-11-14 04:08:41,938 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 04:08:41,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:08:41,939 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:41,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:08:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 04:08:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-14 04:08:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 21 states have call successors, (21), 14 states have call predecessors, (21), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-14 04:08:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-11-14 04:08:41,970 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 79 [2024-11-14 04:08:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:41,971 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-11-14 04:08:41,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-14 04:08:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-11-14 04:08:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-14 04:08:41,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:41,972 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:41,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:08:42,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:42,177 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:42,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -391934995, now seen corresponding path program 1 times [2024-11-14 04:08:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:42,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095393388] [2024-11-14 04:08:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2024-11-14 04:08:42,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:42,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095393388] [2024-11-14 04:08:42,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095393388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207924855] [2024-11-14 04:08:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:42,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:42,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:42,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:08:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:42,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:08:42,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-14 04:08:42,389 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:08:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207924855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:42,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:08:42,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-14 04:08:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233421065] [2024-11-14 04:08:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:42,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:42,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:08:42,392 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 04:08:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:42,464 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2024-11-14 04:08:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:08:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2024-11-14 04:08:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:42,467 INFO L225 Difference]: With dead ends: 99 [2024-11-14 04:08:42,467 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 04:08:42,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:08:42,469 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:42,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:08:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 04:08:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-14 04:08:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 04:08:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-11-14 04:08:42,515 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 84 [2024-11-14 04:08:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:42,516 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-11-14 04:08:42,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 04:08:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-11-14 04:08:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 04:08:42,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:42,518 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:42,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:08:42,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:42,719 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:42,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1600846846, now seen corresponding path program 3 times [2024-11-14 04:08:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:42,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032547798] [2024-11-14 04:08:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:42,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076509534] [2024-11-14 04:08:42,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:08:42,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:42,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:42,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:08:42,886 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:08:42,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:08:42,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 04:08:42,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 66 proven. 51 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-11-14 04:08:43,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-14 04:09:11,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032547798] [2024-11-14 04:09:11,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:09:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076509534] [2024-11-14 04:09:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076509534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255196968] [2024-11-14 04:09:11,538 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 04:09:11,538 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:11,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:11,539 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:11,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:12,780 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:09:12,783 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:09:12,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:15,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5754#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:09:15,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:15,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:09:15,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-11-14 04:09:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046765676] [2024-11-14 04:09:15,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:15,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:09:15,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:09:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:09:15,681 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 16 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-14 04:09:28,594 WARN L286 SmtUtils]: Spent 11.97s on a formula simplification. DAG size of input: 198 DAG size of output: 128 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:09:31,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:09:43,139 WARN L286 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 109 DAG size of output: 81 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:09:51,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:10:07,046 WARN L286 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 179 DAG size of output: 135 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:10:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:07,873 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2024-11-14 04:10:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:10:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 16 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 14 states have call successors, (32) Word has length 92 [2024-11-14 04:10:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:07,876 INFO L225 Difference]: With dead ends: 151 [2024-11-14 04:10:07,876 INFO L226 Difference]: Without dead ends: 149 [2024-11-14 04:10:07,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 236 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:10:07,878 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:07,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 465 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-14 04:10:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-14 04:10:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-11-14 04:10:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 90 states have internal predecessors, (94), 38 states have call successors, (38), 19 states have call predecessors, (38), 19 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-14 04:10:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2024-11-14 04:10:07,936 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 92 [2024-11-14 04:10:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:07,936 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2024-11-14 04:10:07,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 16 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-14 04:10:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2024-11-14 04:10:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-14 04:10:07,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:07,937 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:07,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:10:08,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:08,138 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:08,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -894322653, now seen corresponding path program 4 times [2024-11-14 04:10:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145767312] [2024-11-14 04:10:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:10:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117772107] [2024-11-14 04:10:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:10:08,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:08,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:08,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:10:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:08,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 04:10:08,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 27 proven. 67 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2024-11-14 04:10:08,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:10:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-11-14 04:10:30,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145767312] [2024-11-14 04:10:30,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:10:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117772107] [2024-11-14 04:10:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117772107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:10:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036858823] [2024-11-14 04:10:30,103 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 04:10:30,103 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:10:30,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:10:30,103 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:10:30,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:10:33,112 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:10:33,116 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:10:33,117 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:10:34,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6871#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:10:34,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:10:34,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:10:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2024-11-14 04:10:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972046254] [2024-11-14 04:10:34,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:10:34,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 04:10:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 04:10:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:10:34,205 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-14 04:10:45,755 WARN L286 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 136 DAG size of output: 22 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:10:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:48,086 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2024-11-14 04:10:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 04:10:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) Word has length 97 [2024-11-14 04:10:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:48,088 INFO L225 Difference]: With dead ends: 168 [2024-11-14 04:10:48,088 INFO L226 Difference]: Without dead ends: 146 [2024-11-14 04:10:48,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:10:48,089 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:48,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 263 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 04:10:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-14 04:10:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-11-14 04:10:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 91 states have internal predecessors, (93), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-14 04:10:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2024-11-14 04:10:48,174 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 97 [2024-11-14 04:10:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:48,174 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2024-11-14 04:10:48,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 15 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-14 04:10:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2024-11-14 04:10:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 04:10:48,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:48,176 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:48,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:10:48,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:10:48,376 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:48,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1547905546, now seen corresponding path program 2 times [2024-11-14 04:10:48,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116823022] [2024-11-14 04:10:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:48,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:10:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706724323] [2024-11-14 04:10:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:10:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:48,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:48,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:10:48,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:10:48,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:10:48,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:10:48,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-14 04:10:48,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:10:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-14 04:10:48,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:48,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116823022] [2024-11-14 04:10:48,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:10:48,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706724323] [2024-11-14 04:10:48,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706724323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:10:48,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655783847] [2024-11-14 04:10:48,976 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 04:10:48,976 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:10:48,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:10:48,977 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:10:48,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:10:50,541 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:10:50,546 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:10:50,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:10:51,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8042#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:10:51,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:10:51,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:10:51,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-14 04:10:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567525964] [2024-11-14 04:10:51,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:10:51,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:10:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:51,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:10:51,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:10:51,333 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 04:10:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:51,895 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2024-11-14 04:10:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:10:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2024-11-14 04:10:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:51,897 INFO L225 Difference]: With dead ends: 152 [2024-11-14 04:10:51,897 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 04:10:51,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:10:51,898 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:51,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 181 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:10:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 04:10:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-14 04:10:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.054945054945055) internal successors, (96), 94 states have internal predecessors, (96), 37 states have call successors, (37), 21 states have call predecessors, (37), 21 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-14 04:10:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2024-11-14 04:10:51,956 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 103 [2024-11-14 04:10:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:51,956 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2024-11-14 04:10:51,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 04:10:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2024-11-14 04:10:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 04:10:51,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:51,957 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:51,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:10:52,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:52,162 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:52,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2079618901, now seen corresponding path program 2 times [2024-11-14 04:10:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518691615] [2024-11-14 04:10:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-14 04:10:52,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518691615] [2024-11-14 04:10:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518691615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709953157] [2024-11-14 04:10:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:10:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:52,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:52,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:10:52,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:10:52,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:10:52,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:10:52,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2024-11-14 04:10:52,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:10:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-14 04:10:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709953157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:10:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021781453] [2024-11-14 04:10:53,163 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 04:10:53,163 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:10:53,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:10:53,163 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:10:53,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:10:54,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:10:54,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:10:54,752 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:10:55,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9216#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:10:55,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:10:55,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:10:55,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2024-11-14 04:10:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137330443] [2024-11-14 04:10:55,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:10:55,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:10:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:10:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:10:55,702 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-14 04:10:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:56,337 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2024-11-14 04:10:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:10:56,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) Word has length 108 [2024-11-14 04:10:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:56,339 INFO L225 Difference]: With dead ends: 160 [2024-11-14 04:10:56,339 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 04:10:56,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:10:56,340 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:56,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 279 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:10:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 04:10:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2024-11-14 04:10:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 23 states have call successors, (23), 18 states have call predecessors, (23), 18 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-14 04:10:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2024-11-14 04:10:56,378 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 108 [2024-11-14 04:10:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:56,378 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2024-11-14 04:10:56,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-14 04:10:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2024-11-14 04:10:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 04:10:56,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:56,379 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:56,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:10:56,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:10:56,580 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:56,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash 116944216, now seen corresponding path program 5 times [2024-11-14 04:10:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:56,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799834880] [2024-11-14 04:10:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:10:56,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227806326] [2024-11-14 04:10:56,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:10:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:56,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:56,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:10:56,723 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:10:56,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:10:56,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:10:56,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 158 proven. 20 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2024-11-14 04:10:59,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:12,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799834880] [2024-11-14 04:11:12,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:11:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227806326] [2024-11-14 04:11:12,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227806326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144908712] [2024-11-14 04:11:12,623 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 04:11:12,623 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:12,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:12,623 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:12,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:13,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:11:13,883 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:11:13,884 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:15,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10124#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:11:15,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:15,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:11:15,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-14 04:11:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547910480] [2024-11-14 04:11:15,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:15,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:11:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:11:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1173, Unknown=1, NotChecked=0, Total=1332 [2024-11-14 04:11:15,981 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-14 04:11:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:16,717 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2024-11-14 04:11:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:11:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 121 [2024-11-14 04:11:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:16,719 INFO L225 Difference]: With dead ends: 125 [2024-11-14 04:11:16,719 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 04:11:16,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 222 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=212, Invalid=1427, Unknown=1, NotChecked=0, Total=1640 [2024-11-14 04:11:16,721 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:16,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 235 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:11:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 04:11:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 04:11:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:11:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 04:11:16,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2024-11-14 04:11:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:16,722 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 04:11:16,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-14 04:11:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 04:11:16,723 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 04:11:16,725 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 04:11:16,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:11:16,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:11:16,933 INFO L407 BasicCegarLoop]: Path program histogram: [5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:16,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 04:11:27,856 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:11:27,885 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-14 04:11:27,886 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-14 04:11:27,887 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-14 04:11:27,887 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-14 04:11:27,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:11:27 BoogieIcfgContainer [2024-11-14 04:11:27,903 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:11:27,905 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:11:27,905 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:11:27,906 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:11:27,906 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:08:14" (3/4) ... [2024-11-14 04:11:27,909 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 04:11:27,913 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-14 04:11:27,913 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-14 04:11:27,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-14 04:11:27,922 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-14 04:11:27,922 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-14 04:11:27,922 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 04:11:28,017 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:11:28,018 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 04:11:28,018 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:11:28,019 INFO L158 Benchmark]: Toolchain (without parser) took 193952.31ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 119.2MB in the beginning and 794.4MB in the end (delta: -675.2MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2024-11-14 04:11:28,019 INFO L158 Benchmark]: CDTParser took 1.04ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:11:28,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.94ms. Allocated memory is still 142.6MB. Free memory was 119.0MB in the beginning and 107.6MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:11:28,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.12ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 106.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:11:28,020 INFO L158 Benchmark]: Boogie Preprocessor took 33.30ms. Allocated memory is still 142.6MB. Free memory was 106.5MB in the beginning and 105.8MB in the end (delta: 722.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:11:28,020 INFO L158 Benchmark]: RCFGBuilder took 417.29ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 92.2MB in the end (delta: 13.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:11:28,021 INFO L158 Benchmark]: TraceAbstraction took 193090.94ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 91.5MB in the beginning and 798.7MB in the end (delta: -707.2MB). Peak memory consumption was 481.6MB. Max. memory is 16.1GB. [2024-11-14 04:11:28,021 INFO L158 Benchmark]: Witness Printer took 112.97ms. Allocated memory is still 847.2MB. Free memory was 798.7MB in the beginning and 794.4MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:11:28,023 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.94ms. Allocated memory is still 142.6MB. Free memory was 119.0MB in the beginning and 107.6MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.12ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 106.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.30ms. Allocated memory is still 142.6MB. Free memory was 106.5MB in the beginning and 105.8MB in the end (delta: 722.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 417.29ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 92.2MB in the end (delta: 13.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 193090.94ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 91.5MB in the beginning and 798.7MB in the end (delta: -707.2MB). Peak memory consumption was 481.6MB. Max. memory is 16.1GB. * Witness Printer took 112.97ms. Allocated memory is still 847.2MB. Free memory was 798.7MB in the beginning and 794.4MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 182.0s, OverallIterations: 16, TraceHistogramMax: 19, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 71.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 307 SdHoareTripleChecker+Valid, 13.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 256 mSDsluCounter, 2791 SdHoareTripleChecker+Invalid, 13.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2338 mSDsCounter, 449 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2751 IncrementalHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 449 mSolverCounterUnsat, 453 mSDtfsCounter, 2751 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2621 GetRequests, 2239 SyntacticMatches, 24 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 83.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=14, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 53 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 77.5s InterpolantComputationTime, 2077 NumberOfCodeBlocks, 1931 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 2054 ConstructedInterpolants, 3 QuantifiedInterpolants, 27992 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1953 ConjunctsInSsa, 302 ConjunctsInUnsatCore, 28 InterpolantComputations, 7 PerfectInterpolantSequences, 7008/7586 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((((((((p == 1) && (d == B)) && ((((((long long) A + 1) <= ((long long) 3 * B)) && (2 == q)) && (A == ((__int128) ((long long) 2 * B) + r))) || (((3 == q) && (((__int128) r + ((long long) 3 * B)) == A)) && (((long long) 3 * B) <= A)))) && (A <= 5)) && (((long long) 2 * B) <= A)) && (((long long) A + 1) <= ((long long) 4 * B))) || ((((((((__int128) r + B) == A) && (p == 1)) && (((long long) A + 1) <= ((__int128) 2 * d))) && (d <= A)) && (q == 1)) && (((__int128) d + r) == A))) || (((((((2 == p) && (A <= 5)) && (2 == q)) && (((__int128) d + r) == A)) && (A == ((__int128) ((long long) 2 * B) + r))) && (((long long) 2 * B) <= ((__int128) d + r))) && (((long long) A + 1) <= ((long long) 4 * B)))) || ((((((2 == p) && (((long long) 2 * B) == d)) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || ((((p == 1) && (d == B)) && (q == 0)) && (r == A))) || ((((((((p == 4) && (A <= 5)) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d % 2) : ((d % 2) + 2)) == 0)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r)) && ((((d >= 0) ? (d / 2) : ((d / 2) - 1)) + A) == ((__int128) ((long long) 2 * B) + r)))) || ((((((1 <= p) && (1 <= B)) && (A <= 5)) && (((long long) 4 * B) <= A)) && (((__int128) p * B) == d)) && ((((__int128) q * B) + r) == A))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((((4 <= p) && (A <= 5)) && (q == 0)) && (((long long) 4 * B) <= A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) == ((__int128) ((p >= 0) ? (p / 2) : ((p / 2) - 1)) * B))) && (r == A)) && (((d >= 0) ? (d % 2) : ((d % 2) + 2)) == 0)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r)) || ((((((p == 4) && (A <= 5)) && (q == 0)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) == ((long long) 2 * B))) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || (((((p == 1) && (d == B)) && (A <= 5)) && (q == 0)) && (r == A))) || ((((((2 == p) && (((long long) 2 * B) == d)) && (A <= 5)) && (q == 0)) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-11-14 04:11:28,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff04a6cd-c7a1-42e7-88e0-d5cc58345e31/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE