./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i --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_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/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_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/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_67deaa7d-2504-46c6-8698-4b657b018bfc/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 d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:19:02,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:19:02,811 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:19:02,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:19:02,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:19:02,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:19:02,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:19:02,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:19:02,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:19:02,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:19:02,867 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:19:02,867 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:19:02,867 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:19:02,867 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:19:02,869 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:19:02,870 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:19:02,870 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:19:02,870 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:19:02,870 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:19:02,870 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:19:02,870 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:19:02,871 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:19:02,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:19:02,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:19:02,871 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:19:02,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:19:02,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:19:02,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:19:02,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:19:02,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:19:02,874 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_67deaa7d-2504-46c6-8698-4b657b018bfc/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 -> d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b [2024-11-14 04:19:03,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:19:03,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:19:03,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:19:03,272 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:19:03,272 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:19:03,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i Unable to find full path for "g++" [2024-11-14 04:19:05,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:19:05,705 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:19:05,705 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i [2024-11-14 04:19:05,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/data/628073472/bcd4f93094e54d8a9398ade8402418fa/FLAGd7f2af8a3 [2024-11-14 04:19:05,744 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/data/628073472/bcd4f93094e54d8a9398ade8402418fa [2024-11-14 04:19:05,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:19:05,750 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:19:05,752 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:19:05,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:19:05,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:19:05,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:19:05" (1/1) ... [2024-11-14 04:19:05,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e290b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:05, skipping insertion in model container [2024-11-14 04:19:05,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:19:05" (1/1) ... [2024-11-14 04:19:05,784 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:19:05,994 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_67deaa7d-2504-46c6-8698-4b657b018bfc/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2024-11-14 04:19:06,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:19:06,034 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:19:06,046 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_67deaa7d-2504-46c6-8698-4b657b018bfc/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2024-11-14 04:19:06,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:19:06,085 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:19:06,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06 WrapperNode [2024-11-14 04:19:06,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:19:06,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:19:06,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:19:06,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:19:06,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,122 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-11-14 04:19:06,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:19:06,124 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:19:06,124 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:19:06,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:19:06,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,134 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:19:06,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:19:06,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:19:06,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:19:06,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (1/1) ... [2024-11-14 04:19:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:19:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:06,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:19:06,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:19:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:19:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:19:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:19:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:19:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:19:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:19:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 04:19:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 04:19:06,293 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:19:06,295 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:19:06,485 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 04:19:06,485 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:19:06,532 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:19:06,532 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:19:06,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:19:06 BoogieIcfgContainer [2024-11-14 04:19:06,533 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:19:06,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:19:06,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:19:06,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:19:06,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:19:05" (1/3) ... [2024-11-14 04:19:06,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d62ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:19:06, skipping insertion in model container [2024-11-14 04:19:06,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:06" (2/3) ... [2024-11-14 04:19:06,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d62ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:19:06, skipping insertion in model container [2024-11-14 04:19:06,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:19:06" (3/3) ... [2024-11-14 04:19:06,545 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2024-11-14 04:19:06,564 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:19:06,565 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound5.i that has 3 procedures, 23 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:19:06,630 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:19:06,648 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;@3c554204, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:19:06,648 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:19:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:19:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:19:06,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:06,664 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:06,665 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:06,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1015402591, now seen corresponding path program 1 times [2024-11-14 04:19:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:06,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179717895] [2024-11-14 04:19:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:19:06,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:06,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179717895] [2024-11-14 04:19:06,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179717895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:06,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:19:06,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722414381] [2024-11-14 04:19:06,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:06,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 04:19:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 04:19:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:19:06,977 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:07,012 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2024-11-14 04:19:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 04:19:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2024-11-14 04:19:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:07,023 INFO L225 Difference]: With dead ends: 35 [2024-11-14 04:19:07,023 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 04:19:07,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:19:07,030 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:07,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 04:19:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 04:19:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 04:19:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-11-14 04:19:07,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2024-11-14 04:19:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:07,072 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-11-14 04:19:07,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-11-14 04:19:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:19:07,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:07,074 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:07,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:19:07,074 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:07,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1163110950, now seen corresponding path program 1 times [2024-11-14 04:19:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394485758] [2024-11-14 04:19:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:19:07,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413064935] [2024-11-14 04:19:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:07,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:07,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:07,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:07,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:19:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:07,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:19:07,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:19:07,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:19:08,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394485758] [2024-11-14 04:19:08,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:19:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413064935] [2024-11-14 04:19:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413064935] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:08,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:19:08,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2024-11-14 04:19:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400320437] [2024-11-14 04:19:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:08,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:19:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:19:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:19:08,199 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:08,735 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-14 04:19:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:19:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2024-11-14 04:19:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:08,736 INFO L225 Difference]: With dead ends: 33 [2024-11-14 04:19:08,736 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:19:08,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:19:08,738 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:08,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:19:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:19:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 04:19:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:19:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-14 04:19:08,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2024-11-14 04:19:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:08,747 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-14 04:19:08,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-14 04:19:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:19:08,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:08,748 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:08,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:19:08,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:08,949 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:08,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 255784053, now seen corresponding path program 1 times [2024-11-14 04:19:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084822419] [2024-11-14 04:19:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:19:09,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276783629] [2024-11-14 04:19:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:09,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:09,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:09,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:19:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:09,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:19:09,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:19:09,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:19:09,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084822419] [2024-11-14 04:19:09,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:19:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276783629] [2024-11-14 04:19:09,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276783629] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:09,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:19:09,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-11-14 04:19:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029729902] [2024-11-14 04:19:09,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:09,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:19:09,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:19:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:19:09,450 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:11,661 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 [1] [2024-11-14 04:19:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:11,673 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-11-14 04:19:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:19:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2024-11-14 04:19:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:11,675 INFO L225 Difference]: With dead ends: 40 [2024-11-14 04:19:11,675 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 04:19:11,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:19:11,676 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:11,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 04:19:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 04:19:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-14 04:19:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 04:19:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-14 04:19:11,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2024-11-14 04:19:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:11,690 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-14 04:19:11,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 04:19:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-14 04:19:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 04:19:11,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:11,691 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:11,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:11,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:11,891 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:11,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1915548236, now seen corresponding path program 1 times [2024-11-14 04:19:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091513826] [2024-11-14 04:19:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:19:12,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:12,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091513826] [2024-11-14 04:19:12,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091513826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:12,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:12,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:19:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136417299] [2024-11-14 04:19:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:12,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:19:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:19:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:19:12,695 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:19:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:12,747 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-14 04:19:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:19:12,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-11-14 04:19:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:12,751 INFO L225 Difference]: With dead ends: 46 [2024-11-14 04:19:12,753 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:19:12,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:19:12,754 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:12,756 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:19:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 04:19:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:19:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-14 04:19:12,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 29 [2024-11-14 04:19:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:12,773 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-14 04:19:12,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:19:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-14 04:19:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 04:19:12,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:12,774 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:12,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:19:12,775 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:12,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1626125525, now seen corresponding path program 1 times [2024-11-14 04:19:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:12,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456199925] [2024-11-14 04:19:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:19:13,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:13,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456199925] [2024-11-14 04:19:13,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456199925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:13,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572779622] [2024-11-14 04:19:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:13,073 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:13,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:19:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:13,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:19:13,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:19:13,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:19:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572779622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778452581] [2024-11-14 04:19:13,471 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 04:19:13,471 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:13,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:13,480 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:13,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:14,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2024-11-14 04:19:14,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:19:14,196 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:15,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_8| Int)) (and (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_8| 4294967296) 1) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_8| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_8| 4294967296))))))' at error location [2024-11-14 04:19:15,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:15,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:15,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2024-11-14 04:19:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787296990] [2024-11-14 04:19:15,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:15,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:19:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:19:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:19:15,671 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:19:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:16,693 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2024-11-14 04:19:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:19:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2024-11-14 04:19:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:16,695 INFO L225 Difference]: With dead ends: 45 [2024-11-14 04:19:16,695 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 04:19:16,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:19:16,699 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:16,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:19:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 04:19:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-11-14 04:19:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:19:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 04:19:16,721 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 30 [2024-11-14 04:19:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:16,722 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 04:19:16,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 04:19:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 04:19:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:19:16,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:16,724 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:16,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:16,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:16,925 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:16,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash 342015825, now seen corresponding path program 1 times [2024-11-14 04:19:16,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209689465] [2024-11-14 04:19:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:16,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:19:17,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742920947] [2024-11-14 04:19:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:17,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:17,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:17,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:19:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:17,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 04:19:17,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:19:30,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:19:36,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209689465] [2024-11-14 04:19:36,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:19:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742920947] [2024-11-14 04:19:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742920947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457306711] [2024-11-14 04:19:36,684 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 04:19:36,684 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:36,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:36,685 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:36,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:37,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2024-11-14 04:19:37,411 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-14 04:19:37,413 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:41,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1263#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_52| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_20| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_20|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_20|) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_52| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 04:19:41,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:41,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:19:41,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2024-11-14 04:19:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438874545] [2024-11-14 04:19:41,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:41,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:19:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:19:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:19:41,555 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 04:19:47,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:19:49,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:19:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:49,765 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-14 04:19:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:19:49,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 31 [2024-11-14 04:19:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:49,766 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:19:49,767 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 04:19:49,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 04:19:49,768 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:49,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 123 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 178 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2024-11-14 04:19:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 04:19:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-14 04:19:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 04:19:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-14 04:19:49,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2024-11-14 04:19:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:49,783 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-14 04:19:49,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-14 04:19:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-14 04:19:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 04:19:49,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:49,785 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:49,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:19:49,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:49,987 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:49,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:49,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2067118859, now seen corresponding path program 2 times [2024-11-14 04:19:49,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:49,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947313002] [2024-11-14 04:19:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:19:50,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:50,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947313002] [2024-11-14 04:19:50,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947313002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:50,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525836193] [2024-11-14 04:19:50,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:19:50,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:50,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:50,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:50,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67deaa7d-2504-46c6-8698-4b657b018bfc/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process