./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/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_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/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_76477910-c804-4985-8806-43fbed5ec6ad/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 904eff5ab9a028829a49b56a519e098f085128eb26f428782b06e9247ecafe60 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:47:23,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:47:23,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:47:23,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:47:23,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:47:24,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:47:24,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:47:24,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:47:24,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:47:24,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:47:24,030 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:47:24,030 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:47:24,030 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:47:24,031 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:47:24,032 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:47:24,033 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:47:24,033 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:47:24,033 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:47:24,033 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:47:24,033 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:47:24,033 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:47:24,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:47:24,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:47:24,035 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:47:24,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:47:24,036 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:47:24,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:47:24,036 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_76477910-c804-4985-8806-43fbed5ec6ad/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 -> 904eff5ab9a028829a49b56a519e098f085128eb26f428782b06e9247ecafe60 [2024-11-14 03:47:24,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:47:24,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:47:24,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:47:24,453 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:47:24,454 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:47:24,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c Unable to find full path for "g++" [2024-11-14 03:47:26,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:47:26,816 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:47:26,818 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c [2024-11-14 03:47:26,828 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/data/f578c18cb/e57795313fab4cc79c6ada7d24b66ead/FLAG44494c94c [2024-11-14 03:47:26,857 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/data/f578c18cb/e57795313fab4cc79c6ada7d24b66ead [2024-11-14 03:47:26,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:47:26,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:47:26,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:47:26,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:47:26,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:47:26,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:47:26" (1/1) ... [2024-11-14 03:47:26,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a45457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:26, skipping insertion in model container [2024-11-14 03:47:26,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:47:26" (1/1) ... [2024-11-14 03:47:26,897 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:47:27,106 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_76477910-c804-4985-8806-43fbed5ec6ad/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c[537,550] [2024-11-14 03:47:27,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:47:27,152 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:47:27,165 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_76477910-c804-4985-8806-43fbed5ec6ad/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound5.c[537,550] [2024-11-14 03:47:27,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:47:27,193 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:47:27,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27 WrapperNode [2024-11-14 03:47:27,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:47:27,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:47:27,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:47:27,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:47:27,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,231 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-14 03:47:27,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:47:27,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:47:27,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:47:27,232 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:47:27,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:47:27,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:47:27,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:47:27,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:47:27,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (1/1) ... [2024-11-14 03:47:27,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:47:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:27,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:47:27,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:47:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:47:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:47:27,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:47:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:47:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:47:27,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:47:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 03:47:27,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 03:47:27,437 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:47:27,440 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:47:27,695 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 03:47:27,695 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:47:27,741 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:47:27,741 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 03:47:27,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:47:27 BoogieIcfgContainer [2024-11-14 03:47:27,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:47:27,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:47:27,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:47:27,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:47:27,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:47:26" (1/3) ... [2024-11-14 03:47:27,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cee08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:47:27, skipping insertion in model container [2024-11-14 03:47:27,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:47:27" (2/3) ... [2024-11-14 03:47:27,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cee08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:47:27, skipping insertion in model container [2024-11-14 03:47:27,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:47:27" (3/3) ... [2024-11-14 03:47:27,752 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.c [2024-11-14 03:47:27,769 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:47:27,771 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-u_valuebound5.c that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 03:47:27,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:47:27,861 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;@13f35bb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:47:27,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:47:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:47:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:47:27,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:27,875 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:27,876 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:27,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash -844036563, now seen corresponding path program 1 times [2024-11-14 03:47:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84687359] [2024-11-14 03:47:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:47:28,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:28,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84687359] [2024-11-14 03:47:28,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84687359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:47:28,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:47:28,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:47:28,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026690299] [2024-11-14 03:47:28,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:47:28,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:47:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:47:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:47:28,513 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:47:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:28,690 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2024-11-14 03:47:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:47:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-11-14 03:47:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:28,709 INFO L225 Difference]: With dead ends: 57 [2024-11-14 03:47:28,709 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 03:47:28,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:47:28,720 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:28,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:47:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 03:47:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-14 03:47:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:47:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-14 03:47:28,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-11-14 03:47:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:28,774 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-14 03:47:28,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:47:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-14 03:47:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:47:28,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:28,777 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:28,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:47:28,777 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:28,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:28,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1199674348, now seen corresponding path program 1 times [2024-11-14 03:47:28,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:28,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629186673] [2024-11-14 03:47:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:47:29,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629186673] [2024-11-14 03:47:29,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629186673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:47:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:47:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:47:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278192450] [2024-11-14 03:47:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:47:29,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:47:29,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:47:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:47:29,376 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:47:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:29,576 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-14 03:47:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:47:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2024-11-14 03:47:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:29,579 INFO L225 Difference]: With dead ends: 41 [2024-11-14 03:47:29,579 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 03:47:29,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 03:47:29,580 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:29,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:47:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 03:47:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-14 03:47:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:47:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-14 03:47:29,600 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-11-14 03:47:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:29,602 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-14 03:47:29,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:47:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-14 03:47:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:47:29,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:29,605 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:29,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:47:29,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:29,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1771353677, now seen corresponding path program 1 times [2024-11-14 03:47:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080780559] [2024-11-14 03:47:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:29,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657869476] [2024-11-14 03:47:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:29,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:29,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:29,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:47:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:29,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:47:29,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:47:30,133 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:47:30,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080780559] [2024-11-14 03:47:30,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:47:30,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657869476] [2024-11-14 03:47:30,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657869476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:47:30,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:47:30,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:47:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541127448] [2024-11-14 03:47:30,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:47:30,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:47:30,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:47:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:47:30,136 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:47:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:30,482 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 03:47:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:47:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2024-11-14 03:47:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:30,484 INFO L225 Difference]: With dead ends: 58 [2024-11-14 03:47:30,485 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 03:47:30,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:47:30,486 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:30,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 127 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:47:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 03:47:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-14 03:47:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-14 03:47:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-14 03:47:30,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2024-11-14 03:47:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:30,517 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-14 03:47:30,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:47:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-14 03:47:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:47:30,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:30,519 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:30,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:47:30,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:30,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:30,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1804579360, now seen corresponding path program 1 times [2024-11-14 03:47:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994808798] [2024-11-14 03:47:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:30,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730515259] [2024-11-14 03:47:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:30,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:30,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:30,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:47:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:30,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:47:30,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:47:31,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:47:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:47:34,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994808798] [2024-11-14 03:47:34,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:47:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730515259] [2024-11-14 03:47:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730515259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:47:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188758052] [2024-11-14 03:47:34,289 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 03:47:34,289 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:47:34,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:47:34,300 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:47:34,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:35,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 03:47:35,007 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:47:35,008 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:47:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1188758052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:47:36,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:47:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 10] total 27 [2024-11-14 03:47:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518508] [2024-11-14 03:47:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:47:36,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:47:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:47:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:47:36,507 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 03:47:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:37,165 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-14 03:47:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:47:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2024-11-14 03:47:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:37,167 INFO L225 Difference]: With dead ends: 60 [2024-11-14 03:47:37,167 INFO L226 Difference]: Without dead ends: 58 [2024-11-14 03:47:37,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:47:37,168 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:37,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:47:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-14 03:47:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-14 03:47:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-14 03:47:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-11-14 03:47:37,207 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 34 [2024-11-14 03:47:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:37,208 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-11-14 03:47:37,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 03:47:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-11-14 03:47:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:47:37,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:37,211 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:37,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:47:37,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:37,413 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:37,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389582, now seen corresponding path program 1 times [2024-11-14 03:47:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:37,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655086845] [2024-11-14 03:47:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764924287] [2024-11-14 03:47:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:37,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:37,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:47:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:37,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 03:47:37,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:47:38,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:47:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:47:39,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655086845] [2024-11-14 03:47:39,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:47:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764924287] [2024-11-14 03:47:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764924287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:47:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1450523540] [2024-11-14 03:47:39,039 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 03:47:39,039 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:47:39,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:47:39,039 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:47:39,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:41,224 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2024-11-14 03:47:41,233 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:47:41,236 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:47:42,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1253#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:47:42,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:47:42,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:47:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2024-11-14 03:47:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323269870] [2024-11-14 03:47:42,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:47:42,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:47:42,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:47:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:47:42,677 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 03:47:46,225 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 03:47:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:46,655 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2024-11-14 03:47:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:47:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) Word has length 44 [2024-11-14 03:47:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:46,658 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:47:46,658 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 03:47:46,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:47:46,660 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:46,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 184 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 03:47:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 03:47:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-14 03:47:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 03:47:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2024-11-14 03:47:46,686 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 44 [2024-11-14 03:47:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:46,686 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2024-11-14 03:47:46,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 03:47:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2024-11-14 03:47:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:47:46,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:46,688 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:46,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:47:46,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:46,892 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:46,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1983978796, now seen corresponding path program 1 times [2024-11-14 03:47:46,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:46,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136395137] [2024-11-14 03:47:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:46,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524092213] [2024-11-14 03:47:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:46,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:46,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:46,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:47:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:47,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:47:47,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:47:47,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:47:47,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136395137] [2024-11-14 03:47:47,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:47:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524092213] [2024-11-14 03:47:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524092213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:47:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762524713] [2024-11-14 03:47:47,205 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 03:47:47,205 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:47:47,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:47:47,206 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:47:47,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:47,768 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 03:47:47,772 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:47:47,773 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:47:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [762524713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:47:48,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:47:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 19 [2024-11-14 03:47:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119034906] [2024-11-14 03:47:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:47:48,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:47:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:47:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:47:48,506 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 03:47:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:49,016 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2024-11-14 03:47:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:47:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2024-11-14 03:47:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:49,018 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:47:49,018 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 03:47:49,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:47:49,020 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:49,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 41 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:47:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 03:47:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-14 03:47:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:47:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2024-11-14 03:47:49,044 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 45 [2024-11-14 03:47:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:49,045 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2024-11-14 03:47:49,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 03:47:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2024-11-14 03:47:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 03:47:49,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:49,046 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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 03:47:49,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:47:49,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:47:49,251 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:49,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -22063909, now seen corresponding path program 1 times [2024-11-14 03:47:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:49,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58201935] [2024-11-14 03:47:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:49,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:49,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698974609] [2024-11-14 03:47:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:49,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:49,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:49,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:49,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:47:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:49,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:47:49,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:47:49,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:47:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:47:51,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58201935] [2024-11-14 03:47:51,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:47:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698974609] [2024-11-14 03:47:51,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698974609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:47:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192533503] [2024-11-14 03:47:51,729 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 03:47:51,729 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:47:51,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:47:51,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:47:51,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:53,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2024-11-14 03:47:53,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:47:53,395 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:47:54,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2262#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:47:54,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:47:54,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:47:54,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2024-11-14 03:47:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508363243] [2024-11-14 03:47:54,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:47:54,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:47:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:47:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:47:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:47:54,531 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 03:47:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:55,168 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-14 03:47:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:47:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) Word has length 51 [2024-11-14 03:47:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:55,170 INFO L225 Difference]: With dead ends: 78 [2024-11-14 03:47:55,170 INFO L226 Difference]: Without dead ends: 76 [2024-11-14 03:47:55,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:47:55,171 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:55,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 193 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:47:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-14 03:47:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-14 03:47:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-14 03:47:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-11-14 03:47:55,197 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 51 [2024-11-14 03:47:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:55,197 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-11-14 03:47:55,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 03:47:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-11-14 03:47:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 03:47:55,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:55,199 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:55,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:47:55,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:55,400 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:47:55,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash 143268858, now seen corresponding path program 1 times [2024-11-14 03:47:55,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818591343] [2024-11-14 03:47:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:47:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408967031] [2024-11-14 03:47:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:55,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:55,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:55,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:47:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:55,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:47:55,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-14 03:47:56,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:56,592 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:49:19,109 WARN L286 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:49:45,202 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 2147483648)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~A~0#1| (* .cse1 4294967295)) 4294967296)) (< .cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (< (* .cse1 2) (+ .cse0 1)))) is different from true [2024-11-14 03:49:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 24 refuted. 4 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-14 03:49:45,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818591343] [2024-11-14 03:49:45,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:49:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408967031] [2024-11-14 03:49:45,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408967031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429828327] [2024-11-14 03:49:45,398 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:49:45,398 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:45,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:45,398 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:45,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:01,149 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:50:01,158 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:50:01,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:14,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2926#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:50:14,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:14,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:50:14,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2024-11-14 03:50:14,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863664767] [2024-11-14 03:50:14,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:14,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:50:14,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:14,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:50:14,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=965, Unknown=17, NotChecked=64, Total=1190 [2024-11-14 03:50:14,765 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 16 states have internal predecessors, (32), 13 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 13 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-14 03:50:18,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:50:20,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:50:45,735 WARN L286 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 42 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:50:55,223 WARN L539 Checker$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 03:50:57,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:04,209 WARN L539 Checker$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 03:51:06,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:08,456 WARN L539 Checker$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 03:51:13,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:16,719 WARN L539 Checker$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 03:51:18,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:20,876 WARN L539 Checker$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 03:51:25,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:26,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:29,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:31,010 WARN L539 Checker$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 03:51:33,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:51:34,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:01,015 WARN L286 SmtUtils]: Spent 21.56s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:52:02,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:28,861 WARN L286 SmtUtils]: Spent 18.48s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:52:30,867 WARN L539 Checker$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 03:52:32,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:34,898 WARN L539 Checker$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 03:52:36,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:38,906 WARN L539 Checker$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 03:52:45,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:48,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:52:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:52:49,086 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2024-11-14 03:52:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:52:49,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 16 states have internal predecessors, (32), 13 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 13 states have call predecessors, (22), 11 states have call successors, (22) Word has length 63 [2024-11-14 03:52:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:52:49,092 INFO L225 Difference]: With dead ends: 116 [2024-11-14 03:52:49,092 INFO L226 Difference]: Without dead ends: 114 [2024-11-14 03:52:49,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 154.9s TimeCoverageRelationStatistics Valid=270, Invalid=1681, Unknown=33, NotChecked=86, Total=2070 [2024-11-14 03:52:49,094 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 79 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 58.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:52:49,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 209 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 317 Invalid, 21 Unknown, 99 Unchecked, 58.4s Time] [2024-11-14 03:52:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-14 03:52:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-14 03:52:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-14 03:52:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2024-11-14 03:52:49,145 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 63 [2024-11-14 03:52:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:52:49,146 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2024-11-14 03:52:49,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 16 states have internal predecessors, (32), 13 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 13 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-14 03:52:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2024-11-14 03:52:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 03:52:49,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:52:49,152 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:52:49,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:52:49,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:52:49,352 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:52:49,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:52:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1998790778, now seen corresponding path program 1 times [2024-11-14 03:52:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:52:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790344373] [2024-11-14 03:52:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:52:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:52:49,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009186713] [2024-11-14 03:52:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:52:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:52:49,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:52:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:52:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:49,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:52:49,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:52:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 03:52:51,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:53:04,795 WARN L286 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 51 DAG size of output: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:53:24,952 WARN L286 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:53:35,457 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:53:49,546 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:53:51,558 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 2147483648)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (or (not (= .cse0 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (< (* 2 .cse1) (+ .cse2 1)) (let ((.cse3 (* .cse1 |c_ULTIMATE.start_main_~q~0#1|))) (< (+ (mod .cse3 4294967296) 4294967294) (+ .cse4 (mod (+ .cse3 (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|) 4294967295 |c_ULTIMATE.start_main_~r~0#1|) 4294967296)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse4)) (not (= .cse4 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~p~0#1| 2147483648) 1)) (< .cse2 .cse0))) is different from true [2024-11-14 03:53:59,720 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:54:09,880 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:54:23,335 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:54:31,475 WARN L286 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:54:41,708 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:54:54,987 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:55:03,148 WARN L286 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:55:13,429 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:55:27,712 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 03:55:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 123 trivial. 4 not checked. [2024-11-14 03:55:27,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790344373] [2024-11-14 03:55:27,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:55:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009186713] [2024-11-14 03:55:27,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009186713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866369154] [2024-11-14 03:55:27,765 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 03:55:27,765 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:27,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:27,766 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:27,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:50,701 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:55:50,709 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:55:50,711 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:55,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3793#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:55:55,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:55,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:55:55,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2024-11-14 03:55:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069596237] [2024-11-14 03:55:55,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:55,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:55:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:55:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1023, Unknown=3, NotChecked=66, Total=1260 [2024-11-14 03:55:55,796 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 15 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-11-14 03:56:41,066 WARN L286 SmtUtils]: Spent 43.36s 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 03:56:43,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:56:45,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:56:47,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:56:49,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:56:55,577 WARN L286 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:56:58,235 WARN L539 Checker$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 03:57:00,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:57:02,245 WARN L539 Checker$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 03:57:47,560 WARN L286 SmtUtils]: Spent 36.71s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:57:49,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:57:51,591 WARN L539 Checker$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 03:57:54,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:57:56,482 WARN L539 Checker$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 03:58:01,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:03,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:14,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:16,225 WARN L539 Checker$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 03:58:18,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:26,357 WARN L539 Checker$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 03:58:34,762 WARN L286 SmtUtils]: Spent 7.73s 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 03:58:36,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:38,845 WARN L539 Checker$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 03:58:50,173 WARN L286 SmtUtils]: Spent 9.00s 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 03:58:52,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:54,190 WARN L539 Checker$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 03:58:56,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:58:59,059 WARN L539 Checker$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 03:59:01,068 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 03:59:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:01,074 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2024-11-14 03:59:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:59:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 15 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) Word has length 74 [2024-11-14 03:59:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:01,083 INFO L225 Difference]: With dead ends: 150 [2024-11-14 03:59:01,083 INFO L226 Difference]: Without dead ends: 132 [2024-11-14 03:59:01,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 155.7s TimeCoverageRelationStatistics Valid=317, Invalid=1751, Unknown=6, NotChecked=88, Total=2162 [2024-11-14 03:59:01,085 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 77 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 55.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:01,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 280 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 378 Invalid, 22 Unknown, 100 Unchecked, 55.9s Time] [2024-11-14 03:59:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-14 03:59:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2024-11-14 03:59:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 73 states have internal predecessors, (79), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 03:59:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2024-11-14 03:59:01,149 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 74 [2024-11-14 03:59:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:01,149 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2024-11-14 03:59:01,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 15 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-11-14 03:59:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2024-11-14 03:59:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 03:59:01,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:01,151 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:01,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:59:01,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:59:01,354 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:59:01,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 138621095, now seen corresponding path program 1 times [2024-11-14 03:59:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558582979] [2024-11-14 03:59:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-14 03:59:03,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:03,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558582979] [2024-11-14 03:59:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558582979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:03,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051174815] [2024-11-14 03:59:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:03,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:03,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:03,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:03,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:59:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:03,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:59:03,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-14 03:59:04,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 03:59:11,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051174815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:11,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661633446] [2024-11-14 03:59:11,066 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:59:11,066 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:11,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:11,067 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:11,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:30,814 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:59:30,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 03:59:30,824 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:34,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4765#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:59:34,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:34,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:34,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 12] total 27 [2024-11-14 03:59:34,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17371953] [2024-11-14 03:59:34,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:34,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:59:34,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:59:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:59:34,218 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 20 states have internal predecessors, (43), 15 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 19 states have call predecessors, (36), 15 states have call successors, (36) [2024-11-14 03:59:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:37,368 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2024-11-14 03:59:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:59:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 20 states have internal predecessors, (43), 15 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 19 states have call predecessors, (36), 15 states have call successors, (36) Word has length 79 [2024-11-14 03:59:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:37,371 INFO L225 Difference]: With dead ends: 128 [2024-11-14 03:59:37,371 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 03:59:37,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:59:37,373 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:37,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 341 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 03:59:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 03:59:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 03:59:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 63 states have (on average 1.126984126984127) internal successors, (71), 66 states have internal predecessors, (71), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 03:59:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2024-11-14 03:59:37,445 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 79 [2024-11-14 03:59:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:37,448 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2024-11-14 03:59:37,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 20 states have internal predecessors, (43), 15 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 19 states have call predecessors, (36), 15 states have call successors, (36) [2024-11-14 03:59:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2024-11-14 03:59:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-14 03:59:37,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:37,451 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:37,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:59:37,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:37,652 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:59:37,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -391934995, now seen corresponding path program 1 times [2024-11-14 03:59:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373163702] [2024-11-14 03:59:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2024-11-14 03:59:37,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373163702] [2024-11-14 03:59:37,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373163702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850997997] [2024-11-14 03:59:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:37,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:37,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:37,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:59:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:37,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:59:37,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-14 03:59:38,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-11-14 03:59:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850997997] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:38,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:59:38,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 7 [2024-11-14 03:59:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640296313] [2024-11-14 03:59:38,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:59:38,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:59:38,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:59:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:59:38,246 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:59:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:38,335 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2024-11-14 03:59:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:59:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2024-11-14 03:59:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:38,337 INFO L225 Difference]: With dead ends: 120 [2024-11-14 03:59:38,337 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 03:59:38,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:59:38,338 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:38,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:59:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 03:59:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 03:59:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 66 states have internal predecessors, (69), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 03:59:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2024-11-14 03:59:38,412 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 84 [2024-11-14 03:59:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:38,413 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2024-11-14 03:59:38,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:59:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2024-11-14 03:59:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-14 03:59:38,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:38,416 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:38,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:59:38,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:38,619 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:59:38,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1766539806, now seen corresponding path program 2 times [2024-11-14 03:59:38,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:38,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995330937] [2024-11-14 03:59:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:59:38,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186326583] [2024-11-14 03:59:38,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:59:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:38,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:38,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76477910-c804-4985-8806-43fbed5ec6ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:59:39,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:59:39,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:59:39,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 03:59:39,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2024-11-14 03:59:40,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 25 proven. 16 refuted. 3 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-14 03:59:47,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995330937] [2024-11-14 03:59:47,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:59:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186326583] [2024-11-14 03:59:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186326583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385024972] [2024-11-14 03:59:47,399 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:59:47,399 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:47,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:47,399 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:47,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:00:00,220 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:00:00,228 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:00:00,230 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:00:02,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6572#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:00:02,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:00:02,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:00:02,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2024-11-14 04:00:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208901714] [2024-11-14 04:00:02,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:00:02,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:00:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:00:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=927, Unknown=2, NotChecked=0, Total=1056 [2024-11-14 04:00:02,078 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 13 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-14 04:00:47,194 WARN L286 SmtUtils]: Spent 42.95s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:00:49,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:00:52,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:00:55,500 WARN L539 Checker$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 04:00:58,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:00,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:02,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:05,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:07,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:09,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:11,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:13,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:15,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:18,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:50,805 WARN L286 SmtUtils]: Spent 31.50s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:01:52,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:54,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:56,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:01:58,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:01,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:03,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:05,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:07,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:09,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:10,776 WARN L539 Checker$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 04:02:16,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:18,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:20,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 04:02:22,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []