./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:40:19,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:40:19,303 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:40:19,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:40:19,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:40:19,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:40:19,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:40:19,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:40:19,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:40:19,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:40:19,359 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:40:19,360 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:40:19,360 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:40:19,362 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:40:19,363 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:40:19,363 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:40:19,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:40:19,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:40:19,363 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:40:19,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:40:19,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:40:19,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:40:19,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:40:19,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:40:19,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:40:19,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:40:19,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:40:19,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:40:19,367 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:40:19,367 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:40:19,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:40:19,368 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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/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 -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2024-11-14 05:40:19,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:40:19,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:40:19,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:40:19,729 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:40:19,729 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:40:19,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c Unable to find full path for "g++" [2024-11-14 05:40:21,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:40:21,987 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:40:21,994 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2024-11-14 05:40:22,005 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/data/1d99955ab/905e01d454e8443ba4165f7bb8049bd4/FLAG63725f7be [2024-11-14 05:40:22,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/data/1d99955ab/905e01d454e8443ba4165f7bb8049bd4 [2024-11-14 05:40:22,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:40:22,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:40:22,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:40:22,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:40:22,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:40:22,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ee02f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22, skipping insertion in model container [2024-11-14 05:40:22,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,052 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:40:22,247 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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2024-11-14 05:40:22,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:40:22,294 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:40:22,305 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_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2024-11-14 05:40:22,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:40:22,345 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:40:22,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22 WrapperNode [2024-11-14 05:40:22,346 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:40:22,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:40:22,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:40:22,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:40:22,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,362 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,386 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2024-11-14 05:40:22,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:40:22,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:40:22,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:40:22,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:40:22,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,397 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,411 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:40:22,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:40:22,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:40:22,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:40:22,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (1/1) ... [2024-11-14 05:40:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:40:22,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:22,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:40:22,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:40:22,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:40:22,492 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 05:40:22,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 05:40:22,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:40:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:40:22,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:40:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:40:22,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:40:22,577 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:40:22,579 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:40:22,781 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-14 05:40:22,781 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:40:22,809 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:40:22,809 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 05:40:22,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:40:22 BoogieIcfgContainer [2024-11-14 05:40:22,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:40:22,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:40:22,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:40:22,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:40:22,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:40:22" (1/3) ... [2024-11-14 05:40:22,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2483b801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:40:22, skipping insertion in model container [2024-11-14 05:40:22,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:40:22" (2/3) ... [2024-11-14 05:40:22,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2483b801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:40:22, skipping insertion in model container [2024-11-14 05:40:22,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:40:22" (3/3) ... [2024-11-14 05:40:22,828 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2024-11-14 05:40:22,851 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:40:22,854 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound50.c that has 3 procedures, 29 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 05:40:22,925 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:40:22,943 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;@4c195b32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:40:22,943 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:40:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 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 05:40:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:40:22,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:22,955 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:22,955 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:22,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -143790805, now seen corresponding path program 1 times [2024-11-14 05:40:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180994460] [2024-11-14 05:40:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:40:23,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:23,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180994460] [2024-11-14 05:40:23,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180994460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:23,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:23,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:40:23,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184020424] [2024-11-14 05:40:23,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:23,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:40:23,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:40:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:40:23,166 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:23,193 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2024-11-14 05:40:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:40:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2024-11-14 05:40:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:23,202 INFO L225 Difference]: With dead ends: 50 [2024-11-14 05:40:23,202 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:40:23,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:40:23,208 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:23,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:40:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:40:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 05:40:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:40:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2024-11-14 05:40:23,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2024-11-14 05:40:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:23,248 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2024-11-14 05:40:23,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2024-11-14 05:40:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:40:23,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:23,250 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:23,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:40:23,250 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:23,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1203477869, now seen corresponding path program 1 times [2024-11-14 05:40:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:23,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031543679] [2024-11-14 05:40:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:40:23,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031543679] [2024-11-14 05:40:23,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031543679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:23,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:40:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10800941] [2024-11-14 05:40:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:23,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:40:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:40:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:40:23,491 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:23,541 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-11-14 05:40:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:40:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2024-11-14 05:40:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:23,544 INFO L225 Difference]: With dead ends: 37 [2024-11-14 05:40:23,545 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 05:40:23,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:40:23,546 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:23,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:40:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 05:40:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 05:40:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:40:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-14 05:40:23,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2024-11-14 05:40:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:23,563 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-14 05:40:23,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-14 05:40:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:40:23,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:23,564 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:23,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:40:23,564 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:23,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1341228556, now seen corresponding path program 1 times [2024-11-14 05:40:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346843016] [2024-11-14 05:40:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:40:23,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346843016] [2024-11-14 05:40:23,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346843016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93128914] [2024-11-14 05:40:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:23,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:23,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:23,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:23,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:40:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:23,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:40:23,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:40:23,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:40:24,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93128914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033750909] [2024-11-14 05:40:24,100 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:40:24,101 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:24,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:24,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:24,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:25,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:40:25,519 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:27,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1033750909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:27,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:40:27,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 5] total 15 [2024-11-14 05:40:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367837178] [2024-11-14 05:40:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:27,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:40:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:27,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:40:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:40:27,079 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:40:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:27,711 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-14 05:40:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:40:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-11-14 05:40:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:27,714 INFO L225 Difference]: With dead ends: 39 [2024-11-14 05:40:27,714 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 05:40:27,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:40:27,717 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:27,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 153 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:40:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 05:40:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-14 05:40:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:40:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-14 05:40:27,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2024-11-14 05:40:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:27,728 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-14 05:40:27,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:40:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-14 05:40:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:40:27,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:27,729 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:27,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:27,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:27,930 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:27,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 373669115, now seen corresponding path program 1 times [2024-11-14 05:40:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:27,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049906724] [2024-11-14 05:40:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409545629] [2024-11-14 05:40:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:27,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:40:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:28,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:40:28,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:40:28,074 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:28,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049906724] [2024-11-14 05:40:28,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409545629] [2024-11-14 05:40:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409545629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:28,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:28,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:40:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186247350] [2024-11-14 05:40:28,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:28,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:40:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:40:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:40:28,077 INFO L87 Difference]: Start difference. First operand 30 states and 41 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:28,146 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2024-11-14 05:40:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:40:28,147 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), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2024-11-14 05:40:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:28,148 INFO L225 Difference]: With dead ends: 44 [2024-11-14 05:40:28,148 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 05:40:28,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 05:40:28,149 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:28,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 113 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:40:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 05:40:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-11-14 05:40:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 05:40:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2024-11-14 05:40:28,163 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 23 [2024-11-14 05:40:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:28,163 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2024-11-14 05:40:28,164 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2024-11-14 05:40:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:40:28,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:28,165 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:28,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:40:28,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:28,366 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:28,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash 275905003, now seen corresponding path program 1 times [2024-11-14 05:40:28,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:28,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604710599] [2024-11-14 05:40:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:28,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:40:28,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604710599] [2024-11-14 05:40:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604710599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:28,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:40:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927915184] [2024-11-14 05:40:28,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:28,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:40:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:40:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:40:28,571 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:28,630 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-14 05:40:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:40:28,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2024-11-14 05:40:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:28,634 INFO L225 Difference]: With dead ends: 65 [2024-11-14 05:40:28,634 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 05:40:28,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:40:28,635 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:28,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:40:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 05:40:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-14 05:40:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 05:40:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-11-14 05:40:28,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 26 [2024-11-14 05:40:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:28,655 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-11-14 05:40:28,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 05:40:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-11-14 05:40:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:40:28,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:28,659 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:28,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 05:40:28,659 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:28,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1646055805, now seen corresponding path program 1 times [2024-11-14 05:40:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470746577] [2024-11-14 05:40:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:28,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889882921] [2024-11-14 05:40:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:28,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:28,695 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:28,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:40:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:28,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:40:28,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:40:28,874 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:28,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470746577] [2024-11-14 05:40:28,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889882921] [2024-11-14 05:40:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889882921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:40:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278811616] [2024-11-14 05:40:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:28,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:40:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:40:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:40:28,876 INFO L87 Difference]: Start difference. First operand 39 states and 51 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, (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 05:40:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:28,947 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-11-14 05:40:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:40:28,948 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, (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 28 [2024-11-14 05:40:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:28,949 INFO L225 Difference]: With dead ends: 54 [2024-11-14 05:40:28,949 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 05:40:28,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:40:28,952 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:28,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:40:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 05:40:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-14 05:40:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 05:40:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-11-14 05:40:28,970 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 28 [2024-11-14 05:40:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:28,971 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-11-14 05:40:28,971 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, (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 05:40:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-11-14 05:40:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:40:28,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:28,974 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:28,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:29,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:29,174 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:29,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 204769723, now seen corresponding path program 1 times [2024-11-14 05:40:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065032572] [2024-11-14 05:40:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624288528] [2024-11-14 05:40:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:29,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:29,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:40:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:29,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:40:29,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:40:29,393 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:29,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065032572] [2024-11-14 05:40:29,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624288528] [2024-11-14 05:40:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624288528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:29,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:40:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720635232] [2024-11-14 05:40:29,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:29,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:40:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:40:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:40:29,395 INFO L87 Difference]: Start difference. First operand 51 states and 69 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, (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 05:40:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:29,471 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 05:40:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:40:29,471 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, (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 33 [2024-11-14 05:40:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:29,472 INFO L225 Difference]: With dead ends: 58 [2024-11-14 05:40:29,472 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 05:40:29,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:40:29,473 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:29,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:40:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 05:40:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-14 05:40:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 36 states have internal predecessors, (41), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 05:40:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2024-11-14 05:40:29,486 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 33 [2024-11-14 05:40:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:29,486 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2024-11-14 05:40:29,486 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, (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 05:40:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2024-11-14 05:40:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 05:40:29,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:29,488 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:29,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:29,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:29,689 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:29,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1859090109, now seen corresponding path program 1 times [2024-11-14 05:40:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:29,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002361719] [2024-11-14 05:40:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:29,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016486633] [2024-11-14 05:40:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:29,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:29,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:29,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:29,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:40:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:29,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:40:29,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:40:29,986 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:29,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002361719] [2024-11-14 05:40:29,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016486633] [2024-11-14 05:40:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016486633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:29,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:40:29,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:40:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638436100] [2024-11-14 05:40:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:29,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:40:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:40:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:40:29,990 INFO L87 Difference]: Start difference. First operand 55 states and 72 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:40:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:30,093 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-14 05:40:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:40:30,094 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2024-11-14 05:40:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:30,095 INFO L225 Difference]: With dead ends: 62 [2024-11-14 05:40:30,096 INFO L226 Difference]: Without dead ends: 60 [2024-11-14 05:40:30,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:40:30,097 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:30,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:40:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-14 05:40:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-14 05:40:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 05:40:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-11-14 05:40:30,119 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 38 [2024-11-14 05:40:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:30,120 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-11-14 05:40:30,120 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:40:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-11-14 05:40:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:40:30,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:30,122 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:30,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:30,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 05:40:30,323 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:30,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash 39088359, now seen corresponding path program 1 times [2024-11-14 05:40:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:30,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760564783] [2024-11-14 05:40:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:30,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282008884] [2024-11-14 05:40:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:30,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:30,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:40:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:30,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:40:30,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:30,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:30,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760564783] [2024-11-14 05:40:30,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282008884] [2024-11-14 05:40:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282008884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:30,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528529506] [2024-11-14 05:40:30,653 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 05:40:30,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:30,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:30,653 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:30,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:34,722 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:40:34,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:40:34,729 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:38,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1990#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:40:38,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:38,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:40:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-14 05:40:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97175576] [2024-11-14 05:40:38,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:38,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:40:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:40:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:40:38,303 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:40:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:38,457 INFO L93 Difference]: Finished difference Result 89 states and 124 transitions. [2024-11-14 05:40:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:40:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2024-11-14 05:40:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:38,459 INFO L225 Difference]: With dead ends: 89 [2024-11-14 05:40:38,460 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 05:40:38,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:40:38,461 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:38,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 192 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:40:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 05:40:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2024-11-14 05:40:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:40:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-11-14 05:40:38,476 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 46 [2024-11-14 05:40:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:38,476 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-11-14 05:40:38,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:40:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-11-14 05:40:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:40:38,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:38,477 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:38,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:38,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 05:40:38,678 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:38,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 212178052, now seen corresponding path program 1 times [2024-11-14 05:40:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:38,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193507362] [2024-11-14 05:40:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:38,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193507362] [2024-11-14 05:40:38,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193507362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669121984] [2024-11-14 05:40:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:38,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:40:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:38,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:40:38,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:38,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:39,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669121984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:39,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047205796] [2024-11-14 05:40:39,071 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:40:39,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:39,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:39,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:39,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:43,590 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 05:40:43,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:40:43,776 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:48,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2527#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:40:48,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:48,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:40:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-14 05:40:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819710478] [2024-11-14 05:40:48,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:48,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:40:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:40:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:40:48,073 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 05:40:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:48,303 INFO L93 Difference]: Finished difference Result 208 states and 247 transitions. [2024-11-14 05:40:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:40:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 47 [2024-11-14 05:40:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:48,306 INFO L225 Difference]: With dead ends: 208 [2024-11-14 05:40:48,306 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 05:40:48,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:40:48,307 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:48,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 134 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:40:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 05:40:48,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 192. [2024-11-14 05:40:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 126 states have internal predecessors, (146), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 05:40:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2024-11-14 05:40:48,342 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 47 [2024-11-14 05:40:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:48,342 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2024-11-14 05:40:48,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 05:40:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2024-11-14 05:40:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 05:40:48,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:48,344 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:48,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:40:48,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:40:48,544 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:48,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2018078149, now seen corresponding path program 1 times [2024-11-14 05:40:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:48,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108750581] [2024-11-14 05:40:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:40:48,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108750581] [2024-11-14 05:40:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108750581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31490126] [2024-11-14 05:40:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:48,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:48,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:48,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:48,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:40:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:48,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:40:48,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:40:48,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:40:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31490126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851094439] [2024-11-14 05:40:48,938 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:40:48,938 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:48,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:48,938 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:48,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:52,612 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2024-11-14 05:40:52,783 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:40:52,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:56,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3462#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:40:56,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:56,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:40:56,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-14 05:40:56,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573387344] [2024-11-14 05:40:56,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:56,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:40:56,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:40:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:40:56,910 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:40:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:57,181 INFO L93 Difference]: Finished difference Result 276 states and 361 transitions. [2024-11-14 05:40:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:40:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2024-11-14 05:40:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:57,184 INFO L225 Difference]: With dead ends: 276 [2024-11-14 05:40:57,184 INFO L226 Difference]: Without dead ends: 256 [2024-11-14 05:40:57,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:40:57,186 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:57,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:40:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-14 05:40:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2024-11-14 05:40:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 149 states have (on average 1.2281879194630871) internal successors, (183), 152 states have internal predecessors, (183), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 05:40:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 296 transitions. [2024-11-14 05:40:57,231 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 296 transitions. Word has length 48 [2024-11-14 05:40:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:57,232 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 296 transitions. [2024-11-14 05:40:57,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:40:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 296 transitions. [2024-11-14 05:40:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 05:40:57,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:57,234 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:57,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:40:57,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:40:57,438 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:57,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash 435271584, now seen corresponding path program 1 times [2024-11-14 05:40:57,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:57,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493078645] [2024-11-14 05:40:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:57,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493078645] [2024-11-14 05:40:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493078645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683362407] [2024-11-14 05:40:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:57,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:57,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:57,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:40:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:57,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:40:57,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:57,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:40:57,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683362407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:57,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983776830] [2024-11-14 05:40:57,830 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:40:57,830 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:57,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:57,830 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:57,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:03,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:41:03,341 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:41:03,343 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:07,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4590#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:41:07,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:07,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:41:07,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-14 05:41:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659724838] [2024-11-14 05:41:07,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:07,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:41:07,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:41:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:41:07,029 INFO L87 Difference]: Start difference. First operand 232 states and 296 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 05:41:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:07,300 INFO L93 Difference]: Finished difference Result 341 states and 445 transitions. [2024-11-14 05:41:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:41:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 50 [2024-11-14 05:41:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:07,303 INFO L225 Difference]: With dead ends: 341 [2024-11-14 05:41:07,303 INFO L226 Difference]: Without dead ends: 245 [2024-11-14 05:41:07,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:41:07,305 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:07,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 151 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:41:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-14 05:41:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2024-11-14 05:41:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 161 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 05:41:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 299 transitions. [2024-11-14 05:41:07,347 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 299 transitions. Word has length 50 [2024-11-14 05:41:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:07,347 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 299 transitions. [2024-11-14 05:41:07,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 05:41:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 299 transitions. [2024-11-14 05:41:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:41:07,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:07,349 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:41:07,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:41:07,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 05:41:07,552 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:07,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1360011404, now seen corresponding path program 1 times [2024-11-14 05:41:07,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:07,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669226666] [2024-11-14 05:41:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:07,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:07,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124571235] [2024-11-14 05:41:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:07,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:07,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:41:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:07,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:41:07,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 05:41:07,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 05:41:08,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669226666] [2024-11-14 05:41:08,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124571235] [2024-11-14 05:41:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124571235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:41:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338600468] [2024-11-14 05:41:08,181 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:41:08,181 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:08,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:08,181 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:08,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:11,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 05:41:11,168 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:41:11,170 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:15,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5855#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:41:15,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:15,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:41:15,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-11-14 05:41:15,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501655496] [2024-11-14 05:41:15,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:15,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:41:15,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:41:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:41:15,677 INFO L87 Difference]: Start difference. First operand 241 states and 299 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 05:41:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:16,950 INFO L93 Difference]: Finished difference Result 294 states and 377 transitions. [2024-11-14 05:41:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:41:16,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 55 [2024-11-14 05:41:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:16,953 INFO L225 Difference]: With dead ends: 294 [2024-11-14 05:41:16,954 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 05:41:16,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:41:16,955 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:16,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 360 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:41:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 05:41:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 278. [2024-11-14 05:41:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 181 states have (on average 1.1933701657458564) internal successors, (216), 185 states have internal predecessors, (216), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-14 05:41:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 350 transitions. [2024-11-14 05:41:17,010 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 350 transitions. Word has length 55 [2024-11-14 05:41:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:17,010 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 350 transitions. [2024-11-14 05:41:17,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 05:41:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 350 transitions. [2024-11-14 05:41:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-14 05:41:17,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:17,012 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 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] [2024-11-14 05:41:17,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:41:17,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:41:17,212 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:17,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1294612630, now seen corresponding path program 2 times [2024-11-14 05:41:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:17,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519362606] [2024-11-14 05:41:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723772762] [2024-11-14 05:41:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:41:17,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:17,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:17,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:41:17,365 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:41:17,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:41:17,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 05:41:17,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:41:17,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:17,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519362606] [2024-11-14 05:41:17,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723772762] [2024-11-14 05:41:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723772762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:41:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299131200] [2024-11-14 05:41:17,670 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:41:17,670 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:17,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:17,670 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:17,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:20,937 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2024-11-14 05:41:21,073 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:41:21,074 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:26,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7032#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:41:26,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:26,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:41:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-14 05:41:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272160675] [2024-11-14 05:41:26,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:26,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:41:26,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:41:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:41:26,039 INFO L87 Difference]: Start difference. First operand 278 states and 350 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:41:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:26,288 INFO L93 Difference]: Finished difference Result 300 states and 377 transitions. [2024-11-14 05:41:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:41:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2024-11-14 05:41:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:26,291 INFO L225 Difference]: With dead ends: 300 [2024-11-14 05:41:26,291 INFO L226 Difference]: Without dead ends: 298 [2024-11-14 05:41:26,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:41:26,292 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:26,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:41:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-14 05:41:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2024-11-14 05:41:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 193 states have (on average 1.1917098445595855) internal successors, (230), 197 states have internal predecessors, (230), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-14 05:41:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2024-11-14 05:41:26,346 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 60 [2024-11-14 05:41:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:26,347 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2024-11-14 05:41:26,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 05:41:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2024-11-14 05:41:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 05:41:26,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:26,348 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:41:26,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 05:41:26,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 05:41:26,552 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:26,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 695042292, now seen corresponding path program 3 times [2024-11-14 05:41:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:26,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155460821] [2024-11-14 05:41:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:26,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:26,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166030080] [2024-11-14 05:41:26,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:41:26,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:26,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:26,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:26,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:41:26,666 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:41:26,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:41:26,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 05:41:26,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-14 05:41:27,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:29,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155460821] [2024-11-14 05:41:29,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166030080] [2024-11-14 05:41:29,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166030080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:41:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545563061] [2024-11-14 05:41:29,824 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:41:29,824 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:29,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:29,824 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:29,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:32,554 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 05:41:32,725 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:41:32,726 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:39,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8271#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:41:39,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:39,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:41:39,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-14 05:41:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910224594] [2024-11-14 05:41:39,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:39,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:41:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:41:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:41:39,203 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-14 05:41:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:40,049 INFO L93 Difference]: Finished difference Result 312 states and 386 transitions. [2024-11-14 05:41:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:41:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 65 [2024-11-14 05:41:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:40,052 INFO L225 Difference]: With dead ends: 312 [2024-11-14 05:41:40,052 INFO L226 Difference]: Without dead ends: 308 [2024-11-14 05:41:40,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:41:40,054 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:40,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 176 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:41:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-14 05:41:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2024-11-14 05:41:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 201 states have (on average 1.1791044776119404) internal successors, (237), 204 states have internal predecessors, (237), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-14 05:41:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2024-11-14 05:41:40,110 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 65 [2024-11-14 05:41:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:40,111 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2024-11-14 05:41:40,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-14 05:41:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2024-11-14 05:41:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 05:41:40,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:40,112 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 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 05:41:40,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:41:40,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:40,313 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:40,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1356849103, now seen corresponding path program 1 times [2024-11-14 05:41:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:40,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957593782] [2024-11-14 05:41:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:40,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240079786] [2024-11-14 05:41:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:40,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:41:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:40,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:41:40,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 05:41:41,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-14 05:41:42,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957593782] [2024-11-14 05:41:42,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240079786] [2024-11-14 05:41:42,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240079786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:41:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502621852] [2024-11-14 05:41:42,223 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:41:42,223 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:42,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:42,223 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:42,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:50,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:41:50,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:41:50,543 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:54,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9695#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:41:54,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:54,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:41:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-14 05:41:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366496928] [2024-11-14 05:41:54,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:54,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:41:54,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:41:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:41:54,817 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-14 05:42:00,513 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 05:42:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:00,551 INFO L93 Difference]: Finished difference Result 462 states and 632 transitions. [2024-11-14 05:42:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:42:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 71 [2024-11-14 05:42:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:00,555 INFO L225 Difference]: With dead ends: 462 [2024-11-14 05:42:00,556 INFO L226 Difference]: Without dead ends: 455 [2024-11-14 05:42:00,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=378, Invalid=2702, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:42:00,558 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 136 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 114 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:00,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 513 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 05:42:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2024-11-14 05:42:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 439. [2024-11-14 05:42:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 276 states have (on average 1.2644927536231885) internal successors, (349), 279 states have internal predecessors, (349), 128 states have call successors, (128), 34 states have call predecessors, (128), 34 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2024-11-14 05:42:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 603 transitions. [2024-11-14 05:42:00,658 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 603 transitions. Word has length 71 [2024-11-14 05:42:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:00,658 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 603 transitions. [2024-11-14 05:42:00,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-14 05:42:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 603 transitions. [2024-11-14 05:42:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 05:42:00,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:00,660 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 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 05:42:00,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:42:00,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:00,864 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:00,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1564111963, now seen corresponding path program 4 times [2024-11-14 05:42:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810297665] [2024-11-14 05:42:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-14 05:42:00,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810297665] [2024-11-14 05:42:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810297665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:00,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:42:00,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:42:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141759206] [2024-11-14 05:42:00,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:00,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:42:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:00,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:42:00,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:42:00,988 INFO L87 Difference]: Start difference. First operand 439 states and 603 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 05:42:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:01,229 INFO L93 Difference]: Finished difference Result 709 states and 1042 transitions. [2024-11-14 05:42:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:42:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2024-11-14 05:42:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:01,235 INFO L225 Difference]: With dead ends: 709 [2024-11-14 05:42:01,235 INFO L226 Difference]: Without dead ends: 536 [2024-11-14 05:42:01,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:42:01,239 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:01,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:42:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2024-11-14 05:42:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 467. [2024-11-14 05:42:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 300 states have (on average 1.27) internal successors, (381), 303 states have internal predecessors, (381), 132 states have call successors, (132), 34 states have call predecessors, (132), 34 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2024-11-14 05:42:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 643 transitions. [2024-11-14 05:42:01,379 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 643 transitions. Word has length 87 [2024-11-14 05:42:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:01,381 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 643 transitions. [2024-11-14 05:42:01,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 05:42:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 643 transitions. [2024-11-14 05:42:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 05:42:01,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:01,382 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:01,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 05:42:01,383 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:01,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1019121120, now seen corresponding path program 1 times [2024-11-14 05:42:01,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:01,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784305200] [2024-11-14 05:42:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:01,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:42:01,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109266273] [2024-11-14 05:42:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:01,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:01,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:42:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:01,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 05:42:01,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 33 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-11-14 05:42:02,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:42:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 23 refuted. 7 times theorem prover too weak. 178 trivial. 0 not checked. [2024-11-14 05:42:56,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:56,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784305200] [2024-11-14 05:42:56,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:42:56,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109266273] [2024-11-14 05:42:56,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109266273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:42:56,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059451230] [2024-11-14 05:42:56,048 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:42:56,048 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:42:56,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:42:56,048 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:42:56,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:43:03,950 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:43:03,954 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:43:03,955 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:43:17,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13550#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:43:17,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:43:17,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:43:17,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-11-14 05:43:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165846930] [2024-11-14 05:43:17,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:43:17,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 05:43:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:43:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 05:43:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1575, Unknown=8, NotChecked=0, Total=1806 [2024-11-14 05:43:17,547 INFO L87 Difference]: Start difference. First operand 467 states and 643 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 05:43:20,459 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 05:43:34,731 WARN L286 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:43:41,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:43:43,683 WARN L539 Checker$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 05:43:45,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:43:52,879 WARN L539 Checker$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 05:43:54,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:43:57,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:44:04,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:44:06,507 WARN L539 Checker$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 05:44:20,179 WARN L286 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:44:22,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:44:29,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:44:40,771 WARN L286 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:44:49,997 WARN L286 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:44:54,432 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 05:45:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:45:00,324 INFO L93 Difference]: Finished difference Result 659 states and 955 transitions. [2024-11-14 05:45:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:45:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) Word has length 88 [2024-11-14 05:45:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:45:00,330 INFO L225 Difference]: With dead ends: 659 [2024-11-14 05:45:00,330 INFO L226 Difference]: Without dead ends: 657 [2024-11-14 05:45:00,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 101.0s TimeCoverageRelationStatistics Valid=565, Invalid=3083, Unknown=12, NotChecked=0, Total=3660 [2024-11-14 05:45:00,332 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 117 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:45:00,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 473 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 493 Invalid, 10 Unknown, 0 Unchecked, 32.9s Time] [2024-11-14 05:45:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2024-11-14 05:45:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 597. [2024-11-14 05:45:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 376 states have (on average 1.3164893617021276) internal successors, (495), 384 states have internal predecessors, (495), 184 states have call successors, (184), 36 states have call predecessors, (184), 36 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2024-11-14 05:45:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 861 transitions. [2024-11-14 05:45:00,652 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 861 transitions. Word has length 88 [2024-11-14 05:45:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:45:00,653 INFO L471 AbstractCegarLoop]: Abstraction has 597 states and 861 transitions. [2024-11-14 05:45:00,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 05:45:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 861 transitions. [2024-11-14 05:45:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 05:45:00,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:45:00,655 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 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, 1, 1, 1, 1, 1] [2024-11-14 05:45:00,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:45:00,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:45:00,860 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:45:00,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:45:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash -704857568, now seen corresponding path program 1 times [2024-11-14 05:45:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:45:00,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053586762] [2024-11-14 05:45:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:45:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:45:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-14 05:45:01,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:45:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053586762] [2024-11-14 05:45:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053586762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:45:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181026267] [2024-11-14 05:45:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:45:01,034 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:45:01,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:45:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:45:01,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:45:01,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:45:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2024-11-14 05:45:01,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:45:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-14 05:45:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181026267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:45:01,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172790998] [2024-11-14 05:45:01,308 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 05:45:01,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:45:01,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:45:01,308 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:45:01,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:45:09,636 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:45:09,639 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:45:09,640 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:45:10,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16189#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:45:10,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:45:10,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:45:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-14 05:45:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290744370] [2024-11-14 05:45:10,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:45:10,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:45:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:45:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:45:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:45:10,947 INFO L87 Difference]: Start difference. First operand 597 states and 861 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 05:45:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:45:11,904 INFO L93 Difference]: Finished difference Result 842 states and 1261 transitions. [2024-11-14 05:45:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:45:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2024-11-14 05:45:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:45:11,910 INFO L225 Difference]: With dead ends: 842 [2024-11-14 05:45:11,911 INFO L226 Difference]: Without dead ends: 829 [2024-11-14 05:45:11,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 289 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:45:11,912 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:45:11,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 379 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:45:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2024-11-14 05:45:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 628. [2024-11-14 05:45:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 403 states have (on average 1.3101736972704714) internal successors, (528), 411 states have internal predecessors, (528), 188 states have call successors, (188), 36 states have call predecessors, (188), 36 states have return successors, (186), 180 states have call predecessors, (186), 186 states have call successors, (186) [2024-11-14 05:45:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 902 transitions. [2024-11-14 05:45:12,328 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 902 transitions. Word has length 103 [2024-11-14 05:45:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:45:12,330 INFO L471 AbstractCegarLoop]: Abstraction has 628 states and 902 transitions. [2024-11-14 05:45:12,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 05:45:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 902 transitions. [2024-11-14 05:45:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 05:45:12,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:45:12,333 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 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] [2024-11-14 05:45:12,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 05:45:12,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:12,534 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:45:12,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:45:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 332066041, now seen corresponding path program 1 times [2024-11-14 05:45:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:45:12,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098750091] [2024-11-14 05:45:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:12,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:45:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:45:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-14 05:45:12,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:45:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098750091] [2024-11-14 05:45:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098750091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:45:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488396156] [2024-11-14 05:45:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:12,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:12,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:45:12,813 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:45:12,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:45:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:45:12,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:45:12,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:45:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-14 05:45:13,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:45:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-14 05:45:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488396156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:45:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406208007] [2024-11-14 05:45:13,294 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:45:13,296 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:45:13,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:45:13,297 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:45:13,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:45:20,773 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:45:20,775 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:45:20,776 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:45:21,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19164#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:45:21,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:45:21,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:45:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-11-14 05:45:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728714363] [2024-11-14 05:45:21,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:45:21,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:45:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:45:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:45:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:45:21,568 INFO L87 Difference]: Start difference. First operand 628 states and 902 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-11-14 05:45:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:45:23,204 INFO L93 Difference]: Finished difference Result 1994 states and 2880 transitions. [2024-11-14 05:45:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:45:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) Word has length 103 [2024-11-14 05:45:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:45:23,218 INFO L225 Difference]: With dead ends: 1994 [2024-11-14 05:45:23,218 INFO L226 Difference]: Without dead ends: 1630 [2024-11-14 05:45:23,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=508, Invalid=1844, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:45:23,226 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 238 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:45:23,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 236 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:45:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2024-11-14 05:45:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1562. [2024-11-14 05:45:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 964 states have (on average 1.2354771784232366) internal successors, (1191), 992 states have internal predecessors, (1191), 481 states have call successors, (481), 116 states have call predecessors, (481), 116 states have return successors, (465), 453 states have call predecessors, (465), 465 states have call successors, (465) [2024-11-14 05:45:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2137 transitions. [2024-11-14 05:45:24,108 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2137 transitions. Word has length 103 [2024-11-14 05:45:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:45:24,108 INFO L471 AbstractCegarLoop]: Abstraction has 1562 states and 2137 transitions. [2024-11-14 05:45:24,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-11-14 05:45:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2137 transitions. [2024-11-14 05:45:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 05:45:24,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:45:24,110 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:45:24,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:45:24,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:24,311 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:45:24,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:45:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 785094161, now seen corresponding path program 2 times [2024-11-14 05:45:24,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:45:24,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230326090] [2024-11-14 05:45:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:24,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:45:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:45:24,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564642195] [2024-11-14 05:45:24,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:45:24,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:24,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:45:24,339 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:45:24,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:45:24,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:45:24,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:45:24,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:45:24,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:45:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 29 proven. 43 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-14 05:45:24,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:45:25,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:45:25,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230326090] [2024-11-14 05:45:25,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:45:25,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564642195] [2024-11-14 05:45:25,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564642195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:45:25,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092465519] [2024-11-14 05:45:25,129 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:45:25,129 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:45:25,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:45:25,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:45:25,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:45:33,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:45:33,302 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:45:33,303 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:45:35,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25326#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:45:35,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:45:35,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:45:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-14 05:45:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107972549] [2024-11-14 05:45:35,174 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:45:35,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:45:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:45:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:45:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:45:35,175 INFO L87 Difference]: Start difference. First operand 1562 states and 2137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-14 05:45:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:45:36,333 INFO L93 Difference]: Finished difference Result 1799 states and 2491 transitions. [2024-11-14 05:45:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:45:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2024-11-14 05:45:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:45:36,343 INFO L225 Difference]: With dead ends: 1799 [2024-11-14 05:45:36,343 INFO L226 Difference]: Without dead ends: 1789 [2024-11-14 05:45:36,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:45:36,345 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:45:36,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 294 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:45:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2024-11-14 05:45:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1763. [2024-11-14 05:45:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1081 states have (on average 1.2414431082331174) internal successors, (1342), 1107 states have internal predecessors, (1342), 557 states have call successors, (557), 124 states have call predecessors, (557), 124 states have return successors, (541), 531 states have call predecessors, (541), 541 states have call successors, (541) [2024-11-14 05:45:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2440 transitions. [2024-11-14 05:45:37,262 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2440 transitions. Word has length 105 [2024-11-14 05:45:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:45:37,263 INFO L471 AbstractCegarLoop]: Abstraction has 1763 states and 2440 transitions. [2024-11-14 05:45:37,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-14 05:45:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2440 transitions. [2024-11-14 05:45:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 05:45:37,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:45:37,264 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:45:37,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:45:37,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 05:45:37,469 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:45:37,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:45:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 703299818, now seen corresponding path program 3 times [2024-11-14 05:45:37,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:45:37,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916950491] [2024-11-14 05:45:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:45:37,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:45:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:45:37,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186906562] [2024-11-14 05:45:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:45:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:45:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:45:37,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:45:37,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:45:37,585 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:45:37,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:45:37,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 05:45:37,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:45:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-14 05:45:38,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:45:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-14 05:45:40,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:45:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916950491] [2024-11-14 05:45:40,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:45:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186906562] [2024-11-14 05:45:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186906562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:45:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787700326] [2024-11-14 05:45:40,647 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:45:40,647 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:45:40,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:45:40,648 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:45:40,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:45:48,448 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:45:48,451 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:45:48,452 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:45:50,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31633#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:45:50,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:45:50,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:45:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-14 05:45:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529155302] [2024-11-14 05:45:50,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:45:50,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:45:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:45:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:45:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 05:45:50,516 INFO L87 Difference]: Start difference. First operand 1763 states and 2440 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-14 05:45:58,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:46:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:01,296 INFO L93 Difference]: Finished difference Result 2264 states and 3191 transitions. [2024-11-14 05:46:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:46:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 106 [2024-11-14 05:46:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:01,309 INFO L225 Difference]: With dead ends: 2264 [2024-11-14 05:46:01,309 INFO L226 Difference]: Without dead ends: 2262 [2024-11-14 05:46:01,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:46:01,314 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 138 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:01,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 841 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 05:46:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2024-11-14 05:46:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2150. [2024-11-14 05:46:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 1297 states have (on average 1.249036237471087) internal successors, (1620), 1322 states have internal predecessors, (1620), 709 states have call successors, (709), 143 states have call predecessors, (709), 143 states have return successors, (693), 684 states have call predecessors, (693), 693 states have call successors, (693) [2024-11-14 05:46:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3022 transitions. [2024-11-14 05:46:02,840 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3022 transitions. Word has length 106 [2024-11-14 05:46:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:02,841 INFO L471 AbstractCegarLoop]: Abstraction has 2150 states and 3022 transitions. [2024-11-14 05:46:02,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-14 05:46:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3022 transitions. [2024-11-14 05:46:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 05:46:02,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:02,843 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:02,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:46:03,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:46:03,043 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:03,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2117817619, now seen corresponding path program 4 times [2024-11-14 05:46:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853203498] [2024-11-14 05:46:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:03,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:46:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799081127] [2024-11-14 05:46:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:46:03,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:03,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:03,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:46:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:03,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 05:46:03,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 57 proven. 59 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2024-11-14 05:46:04,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-14 05:46:05,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853203498] [2024-11-14 05:46:05,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:46:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799081127] [2024-11-14 05:46:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799081127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805295666] [2024-11-14 05:46:05,920 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:46:05,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:05,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:05,921 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:05,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:13,383 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:46:13,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:46:13,388 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:15,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39401#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:46:15,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:15,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:46:15,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2024-11-14 05:46:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298525171] [2024-11-14 05:46:15,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:15,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:46:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:46:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 05:46:15,502 INFO L87 Difference]: Start difference. First operand 2150 states and 3022 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2024-11-14 05:46:20,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:46:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:23,304 INFO L93 Difference]: Finished difference Result 2619 states and 3656 transitions. [2024-11-14 05:46:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:46:23,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 110 [2024-11-14 05:46:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:23,349 INFO L225 Difference]: With dead ends: 2619 [2024-11-14 05:46:23,349 INFO L226 Difference]: Without dead ends: 2617 [2024-11-14 05:46:23,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=665, Invalid=4027, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:46:23,355 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:23,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 581 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 05:46:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2024-11-14 05:46:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2413. [2024-11-14 05:46:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 1473 states have (on average 1.2423625254582484) internal successors, (1830), 1505 states have internal predecessors, (1830), 762 states have call successors, (762), 177 states have call predecessors, (762), 177 states have return successors, (746), 730 states have call predecessors, (746), 746 states have call successors, (746) [2024-11-14 05:46:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 3338 transitions. [2024-11-14 05:46:25,251 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 3338 transitions. Word has length 110 [2024-11-14 05:46:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:25,251 INFO L471 AbstractCegarLoop]: Abstraction has 2413 states and 3338 transitions. [2024-11-14 05:46:25,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2024-11-14 05:46:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 3338 transitions. [2024-11-14 05:46:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 05:46:25,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:25,254 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:25,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 05:46:25,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:25,458 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:25,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1242095667, now seen corresponding path program 1 times [2024-11-14 05:46:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:25,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858634442] [2024-11-14 05:46:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-14 05:46:25,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:25,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858634442] [2024-11-14 05:46:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858634442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:46:25,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937323013] [2024-11-14 05:46:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:25,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:25,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:25,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:46:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:46:25,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:46:25,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-14 05:46:26,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-14 05:46:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937323013] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879318847] [2024-11-14 05:46:26,224 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:46:26,224 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:26,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:26,225 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:26,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:34,659 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:46:34,661 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:46:34,662 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:35,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48183#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:46:35,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:35,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:46:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-11-14 05:46:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995471886] [2024-11-14 05:46:35,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:35,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:46:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:35,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:46:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:46:35,967 INFO L87 Difference]: Start difference. First operand 2413 states and 3338 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2024-11-14 05:46:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:46:37,830 INFO L93 Difference]: Finished difference Result 2501 states and 3431 transitions. [2024-11-14 05:46:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:46:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) Word has length 120 [2024-11-14 05:46:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:46:37,842 INFO L225 Difference]: With dead ends: 2501 [2024-11-14 05:46:37,842 INFO L226 Difference]: Without dead ends: 2441 [2024-11-14 05:46:37,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=1859, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:46:37,844 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 216 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:46:37,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 247 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:46:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2024-11-14 05:46:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2427. [2024-11-14 05:46:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1490 states have (on average 1.2147651006711409) internal successors, (1810), 1520 states have internal predecessors, (1810), 760 states have call successors, (760), 177 states have call predecessors, (760), 176 states have return successors, (745), 729 states have call predecessors, (745), 745 states have call successors, (745) [2024-11-14 05:46:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3315 transitions. [2024-11-14 05:46:39,131 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3315 transitions. Word has length 120 [2024-11-14 05:46:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:46:39,131 INFO L471 AbstractCegarLoop]: Abstraction has 2427 states and 3315 transitions. [2024-11-14 05:46:39,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2024-11-14 05:46:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3315 transitions. [2024-11-14 05:46:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 05:46:39,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:46:39,134 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:46:39,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 05:46:39,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 05:46:39,338 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:46:39,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:46:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -155403156, now seen corresponding path program 2 times [2024-11-14 05:46:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:46:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892291666] [2024-11-14 05:46:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:46:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:46:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:46:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423875174] [2024-11-14 05:46:39,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:46:39,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:46:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:46:39,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:46:39,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:46:39,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:46:39,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:46:39,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 05:46:39,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:46:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 75 proven. 58 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-11-14 05:46:40,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:46:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-14 05:46:43,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:46:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892291666] [2024-11-14 05:46:43,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:46:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423875174] [2024-11-14 05:46:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423875174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:46:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375635644] [2024-11-14 05:46:43,612 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:46:43,613 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:46:43,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:46:43,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:46:43,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:46:51,146 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:46:51,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:46:51,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:46:54,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56777#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:46:54,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:46:54,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:46:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-11-14 05:46:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816608893] [2024-11-14 05:46:54,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:46:54,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 05:46:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:46:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 05:46:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 05:46:54,295 INFO L87 Difference]: Start difference. First operand 2427 states and 3315 transitions. Second operand has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-14 05:47:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:06,487 INFO L93 Difference]: Finished difference Result 2778 states and 3851 transitions. [2024-11-14 05:47:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:47:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 121 [2024-11-14 05:47:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:06,502 INFO L225 Difference]: With dead ends: 2778 [2024-11-14 05:47:06,502 INFO L226 Difference]: Without dead ends: 2765 [2024-11-14 05:47:06,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=912, Invalid=5250, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 05:47:06,505 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 218 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:06,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1073 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 05:47:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2024-11-14 05:47:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2722. [2024-11-14 05:47:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 1678 states have (on average 1.2228843861740166) internal successors, (2052), 1707 states have internal predecessors, (2052), 854 states have call successors, (854), 189 states have call predecessors, (854), 189 states have return successors, (846), 825 states have call predecessors, (846), 846 states have call successors, (846) [2024-11-14 05:47:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3752 transitions. [2024-11-14 05:47:08,641 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3752 transitions. Word has length 121 [2024-11-14 05:47:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:08,641 INFO L471 AbstractCegarLoop]: Abstraction has 2722 states and 3752 transitions. [2024-11-14 05:47:08,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-14 05:47:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3752 transitions. [2024-11-14 05:47:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 05:47:08,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:08,643 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:08,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 05:47:08,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:08,848 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:08,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 46679805, now seen corresponding path program 5 times [2024-11-14 05:47:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:08,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492769382] [2024-11-14 05:47:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:47:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627807665] [2024-11-14 05:47:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:47:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:08,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:08,873 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:08,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:47:09,025 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:47:09,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:09,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:47:09,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 78 proven. 75 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-11-14 05:47:09,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 104 proven. 7 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-11-14 05:47:09,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492769382] [2024-11-14 05:47:09,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:47:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627807665] [2024-11-14 05:47:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627807665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976719193] [2024-11-14 05:47:09,786 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:47:09,786 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:09,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:09,786 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:09,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:17,615 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:47:17,618 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:47:17,619 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:20,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66345#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:47:20,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:20,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:47:20,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2024-11-14 05:47:20,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127994030] [2024-11-14 05:47:20,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:20,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:47:20,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:47:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:47:20,128 INFO L87 Difference]: Start difference. First operand 2722 states and 3752 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 10 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 05:47:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:23,571 INFO L93 Difference]: Finished difference Result 2971 states and 4073 transitions. [2024-11-14 05:47:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:47:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 10 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 128 [2024-11-14 05:47:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:23,583 INFO L225 Difference]: With dead ends: 2971 [2024-11-14 05:47:23,583 INFO L226 Difference]: Without dead ends: 2921 [2024-11-14 05:47:23,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 05:47:23,586 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:23,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 641 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:47:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2024-11-14 05:47:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2769. [2024-11-14 05:47:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 1723 states have (on average 1.2066163668020893) internal successors, (2079), 1745 states have internal predecessors, (2079), 841 states have call successors, (841), 204 states have call predecessors, (841), 204 states have return successors, (834), 819 states have call predecessors, (834), 834 states have call successors, (834) [2024-11-14 05:47:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 3754 transitions. [2024-11-14 05:47:25,491 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 3754 transitions. Word has length 128 [2024-11-14 05:47:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:25,492 INFO L471 AbstractCegarLoop]: Abstraction has 2769 states and 3754 transitions. [2024-11-14 05:47:25,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 10 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 05:47:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 3754 transitions. [2024-11-14 05:47:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 05:47:25,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:25,495 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:25,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-14 05:47:25,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 05:47:25,699 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:25,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1982652131, now seen corresponding path program 6 times [2024-11-14 05:47:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362836405] [2024-11-14 05:47:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:47:25,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654918870] [2024-11-14 05:47:25,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:47:25,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:25,728 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:25,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:47:25,858 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:47:25,859 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:25,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 05:47:25,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 143 proven. 118 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2024-11-14 05:47:29,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:32,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362836405] [2024-11-14 05:47:32,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:47:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654918870] [2024-11-14 05:47:32,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654918870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637543700] [2024-11-14 05:47:32,839 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:47:32,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:32,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:32,839 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:32,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:40,472 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:47:40,476 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:47:40,477 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:44,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75965#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:47:44,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:44,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:47:44,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-14 05:47:44,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792347565] [2024-11-14 05:47:44,118 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:47:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:47:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 05:47:44,120 INFO L87 Difference]: Start difference. First operand 2769 states and 3754 transitions. Second operand has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 05:47:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:49,322 INFO L93 Difference]: Finished difference Result 2801 states and 3779 transitions. [2024-11-14 05:47:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:47:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2024-11-14 05:47:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:49,336 INFO L225 Difference]: With dead ends: 2801 [2024-11-14 05:47:49,336 INFO L226 Difference]: Without dead ends: 2799 [2024-11-14 05:47:49,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=321, Invalid=2759, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:47:49,338 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:49,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 731 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 05:47:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2024-11-14 05:47:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2793. [2024-11-14 05:47:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 1741 states have (on average 1.2039058012636417) internal successors, (2096), 1763 states have internal predecessors, (2096), 841 states have call successors, (841), 210 states have call predecessors, (841), 210 states have return successors, (834), 819 states have call predecessors, (834), 834 states have call successors, (834) [2024-11-14 05:47:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3771 transitions. [2024-11-14 05:47:51,412 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3771 transitions. Word has length 138 [2024-11-14 05:47:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:51,412 INFO L471 AbstractCegarLoop]: Abstraction has 2793 states and 3771 transitions. [2024-11-14 05:47:51,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 05:47:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3771 transitions. [2024-11-14 05:47:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 05:47:51,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:51,415 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:51,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 05:47:51,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:47:51,615 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:51,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -545590511, now seen corresponding path program 7 times [2024-11-14 05:47:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219846060] [2024-11-14 05:47:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:47:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990098521] [2024-11-14 05:47:51,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:47:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:51,649 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:47:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:51,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 05:47:51,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 116 proven. 169 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-14 05:47:54,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:55,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219846060] [2024-11-14 05:47:55,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:47:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990098521] [2024-11-14 05:47:55,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990098521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413832752] [2024-11-14 05:47:55,325 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:47:55,325 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:55,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:55,326 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:55,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:04,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:48:04,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:48:04,157 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:10,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85340#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:48:10,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:10,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:48:10,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-14 05:48:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804294454] [2024-11-14 05:48:10,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:10,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:48:10,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:48:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:48:10,603 INFO L87 Difference]: Start difference. First operand 2793 states and 3771 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-14 05:48:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:15,303 INFO L93 Difference]: Finished difference Result 2868 states and 3851 transitions. [2024-11-14 05:48:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:48:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 161 [2024-11-14 05:48:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:15,316 INFO L225 Difference]: With dead ends: 2868 [2024-11-14 05:48:15,316 INFO L226 Difference]: Without dead ends: 2864 [2024-11-14 05:48:15,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:48:15,318 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 66 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:15,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 771 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 05:48:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2024-11-14 05:48:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2858. [2024-11-14 05:48:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 1784 states have (on average 1.2006726457399104) internal successors, (2142), 1805 states have internal predecessors, (2142), 853 states have call successors, (853), 221 states have call predecessors, (853), 220 states have return successors, (846), 831 states have call predecessors, (846), 846 states have call successors, (846) [2024-11-14 05:48:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 3841 transitions. [2024-11-14 05:48:17,693 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 3841 transitions. Word has length 161 [2024-11-14 05:48:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:17,693 INFO L471 AbstractCegarLoop]: Abstraction has 2858 states and 3841 transitions. [2024-11-14 05:48:17,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-14 05:48:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 3841 transitions. [2024-11-14 05:48:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 05:48:17,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:17,695 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:17,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:48:17,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:48:17,896 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:17,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1500632046, now seen corresponding path program 3 times [2024-11-14 05:48:17,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:17,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452012392] [2024-11-14 05:48:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:17,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:48:17,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102527505] [2024-11-14 05:48:17,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:48:17,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:17,927 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:17,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:48:18,060 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:48:18,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:18,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 05:48:18,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 113 proven. 122 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2024-11-14 05:48:20,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:24,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452012392] [2024-11-14 05:48:24,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:48:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102527505] [2024-11-14 05:48:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102527505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115579309] [2024-11-14 05:48:24,657 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:48:24,657 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:24,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:24,657 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:24,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:32,699 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:48:32,703 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:48:32,705 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:36,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94971#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:48:36,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:36,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:48:36,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-14 05:48:36,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213234141] [2024-11-14 05:48:36,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:36,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:48:36,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:48:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:48:36,674 INFO L87 Difference]: Start difference. First operand 2858 states and 3841 transitions. Second operand has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-14 05:48:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:46,056 INFO L93 Difference]: Finished difference Result 2941 states and 3934 transitions. [2024-11-14 05:48:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:48:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 167 [2024-11-14 05:48:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:46,073 INFO L225 Difference]: With dead ends: 2941 [2024-11-14 05:48:46,073 INFO L226 Difference]: Without dead ends: 2936 [2024-11-14 05:48:46,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=209, Invalid=2443, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:48:46,076 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 62 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:46,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1002 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-14 05:48:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2024-11-14 05:48:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2899. [2024-11-14 05:48:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 1815 states have (on average 1.1966942148760331) internal successors, (2172), 1836 states have internal predecessors, (2172), 852 states have call successors, (852), 231 states have call predecessors, (852), 231 states have return successors, (846), 831 states have call predecessors, (846), 846 states have call successors, (846) [2024-11-14 05:48:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 3870 transitions. [2024-11-14 05:48:48,262 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 3870 transitions. Word has length 167 [2024-11-14 05:48:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:48,263 INFO L471 AbstractCegarLoop]: Abstraction has 2899 states and 3870 transitions. [2024-11-14 05:48:48,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-14 05:48:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 3870 transitions. [2024-11-14 05:48:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-14 05:48:48,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:48,266 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:48,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 05:48:48,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:48:48,468 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:48:48,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash -434481471, now seen corresponding path program 8 times [2024-11-14 05:48:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:48,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863950748] [2024-11-14 05:48:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:48:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137642562] [2024-11-14 05:48:48,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:48,506 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:48,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:48:48,704 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:48:48,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:48,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 05:48:48,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 182 proven. 138 refuted. 0 times theorem prover too weak. 1189 trivial. 0 not checked. [2024-11-14 05:48:50,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:51,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863950748] [2024-11-14 05:48:51,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:48:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137642562] [2024-11-14 05:48:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137642562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816597932] [2024-11-14 05:48:51,873 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:48:51,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:51,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:51,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:51,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:00,022 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:49:00,026 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:49:00,027 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:03,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104879#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:49:03,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:03,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:49:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-14 05:49:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041316269] [2024-11-14 05:49:03,135 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:03,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:49:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:49:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:49:03,136 INFO L87 Difference]: Start difference. First operand 2899 states and 3870 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-14 05:49:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:06,580 INFO L93 Difference]: Finished difference Result 3113 states and 4134 transitions. [2024-11-14 05:49:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:49:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 179 [2024-11-14 05:49:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:06,594 INFO L225 Difference]: With dead ends: 3113 [2024-11-14 05:49:06,594 INFO L226 Difference]: Without dead ends: 3111 [2024-11-14 05:49:06,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:49:06,596 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 31 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:06,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 619 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 05:49:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2024-11-14 05:49:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3093. [2024-11-14 05:49:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 1933 states have (on average 1.1929643041903777) internal successors, (2306), 1949 states have internal predecessors, (2306), 905 states have call successors, (905), 254 states have call predecessors, (905), 254 states have return successors, (899), 889 states have call predecessors, (899), 899 states have call successors, (899) [2024-11-14 05:49:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 4110 transitions. [2024-11-14 05:49:08,822 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 4110 transitions. Word has length 179 [2024-11-14 05:49:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:08,823 INFO L471 AbstractCegarLoop]: Abstraction has 3093 states and 4110 transitions. [2024-11-14 05:49:08,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-14 05:49:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 4110 transitions. [2024-11-14 05:49:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-14 05:49:08,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:08,826 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:08,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:49:09,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:09,031 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:49:09,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash 814295032, now seen corresponding path program 9 times [2024-11-14 05:49:09,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:09,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981597495] [2024-11-14 05:49:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:49:09,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999656928] [2024-11-14 05:49:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:49:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:09,080 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:09,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:49:09,238 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:49:09,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:09,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 05:49:09,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 131 proven. 224 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2024-11-14 05:49:25,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:28,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981597495] [2024-11-14 05:49:28,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:49:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999656928] [2024-11-14 05:49:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999656928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175868306] [2024-11-14 05:49:28,682 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:49:28,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:28,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:28,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:28,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:37,169 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:49:37,173 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:49:37,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:51,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115344#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:49:51,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:51,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:49:51,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-14 05:49:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26591458] [2024-11-14 05:49:51,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:51,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 05:49:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 05:49:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2145, Unknown=2, NotChecked=0, Total=2352 [2024-11-14 05:49:51,088 INFO L87 Difference]: Start difference. First operand 3093 states and 4110 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2024-11-14 05:50:03,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 05:50:06,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 05:50:25,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 05:50:30,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 05:50:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:32,513 INFO L93 Difference]: Finished difference Result 3208 states and 4242 transitions. [2024-11-14 05:50:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 05:50:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 183 [2024-11-14 05:50:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:32,527 INFO L225 Difference]: With dead ends: 3208 [2024-11-14 05:50:32,527 INFO L226 Difference]: Without dead ends: 3206 [2024-11-14 05:50:32,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=318, Invalid=3462, Unknown=2, NotChecked=0, Total=3782 [2024-11-14 05:50:32,530 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 69 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:32,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 955 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1159 Invalid, 1 Unknown, 0 Unchecked, 24.9s Time] [2024-11-14 05:50:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2024-11-14 05:50:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3182. [2024-11-14 05:50:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 1989 states have (on average 1.1900452488687783) internal successors, (2367), 2005 states have internal predecessors, (2367), 925 states have call successors, (925), 267 states have call predecessors, (925), 267 states have return successors, (919), 909 states have call predecessors, (919), 919 states have call successors, (919) [2024-11-14 05:50:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4211 transitions. [2024-11-14 05:50:35,085 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4211 transitions. Word has length 183 [2024-11-14 05:50:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:35,086 INFO L471 AbstractCegarLoop]: Abstraction has 3182 states and 4211 transitions. [2024-11-14 05:50:35,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2024-11-14 05:50:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4211 transitions. [2024-11-14 05:50:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 05:50:35,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:35,089 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:50:35,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 05:50:35,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:35,290 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:35,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1172179747, now seen corresponding path program 10 times [2024-11-14 05:50:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:35,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258701065] [2024-11-14 05:50:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:50:35,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130283094] [2024-11-14 05:50:35,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:50:35,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:35,340 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:35,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:50:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:35,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 05:50:35,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 131 proven. 155 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2024-11-14 05:50:39,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:40,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258701065] [2024-11-14 05:50:40,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:50:40,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130283094] [2024-11-14 05:50:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130283094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:40,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966501548] [2024-11-14 05:50:40,359 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:50:40,359 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:40,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:40,359 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:40,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:48,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:50:48,882 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:50:48,883 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:52,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '126049#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:50:52,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:52,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:50:52,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-14 05:50:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116792633] [2024-11-14 05:50:52,670 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:52,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:50:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:50:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 05:50:52,671 INFO L87 Difference]: Start difference. First operand 3182 states and 4211 transitions. Second operand has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-11-14 05:50:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:58,779 INFO L93 Difference]: Finished difference Result 3234 states and 4260 transitions. [2024-11-14 05:50:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:50:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 184 [2024-11-14 05:50:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:58,795 INFO L225 Difference]: With dead ends: 3234 [2024-11-14 05:50:58,795 INFO L226 Difference]: Without dead ends: 3232 [2024-11-14 05:50:58,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 05:50:58,797 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 72 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:58,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 913 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-14 05:50:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2024-11-14 05:51:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3195. [2024-11-14 05:51:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 2001 states have (on average 1.1884057971014492) internal successors, (2378), 2017 states have internal predecessors, (2378), 921 states have call successors, (921), 272 states have call predecessors, (921), 272 states have return successors, (915), 905 states have call predecessors, (915), 915 states have call successors, (915) [2024-11-14 05:51:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4214 transitions. [2024-11-14 05:51:01,445 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4214 transitions. Word has length 184 [2024-11-14 05:51:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:01,445 INFO L471 AbstractCegarLoop]: Abstraction has 3195 states and 4214 transitions. [2024-11-14 05:51:01,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-11-14 05:51:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4214 transitions. [2024-11-14 05:51:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 05:51:01,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:01,449 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:01,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 05:51:01,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:01,650 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:51:01,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1551104099, now seen corresponding path program 11 times [2024-11-14 05:51:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:51:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155367251] [2024-11-14 05:51:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:51:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:51:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602189243] [2024-11-14 05:51:01,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:51:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:01,693 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:51:01,872 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:51:01,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:51:01,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 05:51:01,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 282 proven. 184 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2024-11-14 05:51:09,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:11,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:51:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155367251] [2024-11-14 05:51:11,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:51:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602189243] [2024-11-14 05:51:11,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602189243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231094665] [2024-11-14 05:51:11,848 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:51:11,848 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:51:11,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:51:11,848 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:51:11,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:51:20,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:51:20,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:51:20,668 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:51:28,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '136874#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:51:28,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:51:28,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:51:28,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-14 05:51:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246909215] [2024-11-14 05:51:28,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:28,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:51:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:51:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:51:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 05:51:28,045 INFO L87 Difference]: Start difference. First operand 3195 states and 4214 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-14 05:51:33,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 05:51:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:36,902 INFO L93 Difference]: Finished difference Result 3425 states and 4497 transitions. [2024-11-14 05:51:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:51:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 184 [2024-11-14 05:51:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:36,917 INFO L225 Difference]: With dead ends: 3425 [2024-11-14 05:51:36,917 INFO L226 Difference]: Without dead ends: 3421 [2024-11-14 05:51:36,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=311, Invalid=2445, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:51:36,920 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 57 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:36,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 923 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 799 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 05:51:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3421 states. [2024-11-14 05:51:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3421 to 3380. [2024-11-14 05:51:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2121 states have (on average 1.1862329090051862) internal successors, (2516), 2136 states have internal predecessors, (2516), 969 states have call successors, (969), 290 states have call predecessors, (969), 289 states have return successors, (963), 953 states have call predecessors, (963), 963 states have call successors, (963) [2024-11-14 05:51:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4448 transitions. [2024-11-14 05:51:39,494 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4448 transitions. Word has length 184 [2024-11-14 05:51:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:39,495 INFO L471 AbstractCegarLoop]: Abstraction has 3380 states and 4448 transitions. [2024-11-14 05:51:39,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-14 05:51:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4448 transitions. [2024-11-14 05:51:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-14 05:51:39,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:39,499 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:39,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:39,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:39,700 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:51:39,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash 119949606, now seen corresponding path program 12 times [2024-11-14 05:51:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:51:39,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108378192] [2024-11-14 05:51:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:51:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:51:39,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281631254] [2024-11-14 05:51:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:51:39,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:39,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:39,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:51:39,912 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:51:39,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:51:39,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-14 05:51:39,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 259 proven. 290 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2024-11-14 05:51:45,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:51,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:51:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108378192] [2024-11-14 05:51:51,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:51:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281631254] [2024-11-14 05:51:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281631254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355900891] [2024-11-14 05:51:51,448 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 05:51:51,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:51:51,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:51:51,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:51:51,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:51:59,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 05:51:59,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:51:59,070 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:04,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '148283#(and (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:52:04,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:04,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:52:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-14 05:52:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765597292] [2024-11-14 05:52:04,471 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:04,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 05:52:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 05:52:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2455, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:52:04,472 INFO L87 Difference]: Start difference. First operand 3380 states and 4448 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 13 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 13 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-14 05:52:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:11,319 INFO L93 Difference]: Finished difference Result 3413 states and 4476 transitions. [2024-11-14 05:52:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:52:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 13 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 13 states have call predecessors, (31), 12 states have call successors, (31) Word has length 188 [2024-11-14 05:52:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:11,333 INFO L225 Difference]: With dead ends: 3413 [2024-11-14 05:52:11,333 INFO L226 Difference]: Without dead ends: 3411 [2024-11-14 05:52:11,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=454, Invalid=3836, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:52:11,336 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 77 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:11,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 768 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 05:52:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2024-11-14 05:52:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3400. [2024-11-14 05:52:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 2136 states have (on average 1.1849250936329587) internal successors, (2531), 2151 states have internal predecessors, (2531), 969 states have call successors, (969), 295 states have call predecessors, (969), 294 states have return successors, (963), 953 states have call predecessors, (963), 963 states have call successors, (963) [2024-11-14 05:52:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4463 transitions. [2024-11-14 05:52:14,148 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4463 transitions. Word has length 188 [2024-11-14 05:52:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:14,148 INFO L471 AbstractCegarLoop]: Abstraction has 3400 states and 4463 transitions. [2024-11-14 05:52:14,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 13 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 13 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-14 05:52:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4463 transitions. [2024-11-14 05:52:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-14 05:52:14,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:14,152 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:14,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:52:14,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:14,357 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:52:14,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 64693272, now seen corresponding path program 4 times [2024-11-14 05:52:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:14,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224091363] [2024-11-14 05:52:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:52:14,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156276243] [2024-11-14 05:52:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:52:14,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:14,400 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:14,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b66cddc-00ce-4699-8c5a-b2b0739c5feb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:52:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:14,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 05:52:14,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 133 proven. 164 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2024-11-14 05:52:16,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 133 proven. 161 refuted. 0 times theorem prover too weak. 1443 trivial. 0 not checked. [2024-11-14 05:52:23,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224091363] [2024-11-14 05:52:23,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:52:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156276243] [2024-11-14 05:52:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156276243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83123912] [2024-11-14 05:52:23,348 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 05:52:23,348 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:23,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:23,349 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:23,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:31,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 05:52:31,482 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 05:52:31,483 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:35,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '160225#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 05:52:35,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:35,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:52:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-11-14 05:52:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456733156] [2024-11-14 05:52:35,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:35,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 05:52:35,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 05:52:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:52:35,193 INFO L87 Difference]: Start difference. First operand 3400 states and 4463 transitions. Second operand has 36 states, 33 states have (on average 2.484848484848485) internal successors, (82), 32 states have internal predecessors, (82), 22 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2024-11-14 05:53:54,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:54:02,176 WARN L539 Checker$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 05:54:44,649 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 123 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:54:49,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []