./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.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_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/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_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/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_d2154686-3535-4725-a19b-0ad32558f24d/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 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:25:34,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:25:34,661 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:25:34,673 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:25:34,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:25:34,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:25:34,713 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:25:34,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:25:34,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:25:34,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:25:34,713 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:25:34,713 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:25:34,713 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:25:34,714 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:25:34,714 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:25:34,715 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:25:34,718 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:25:34,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:25:34,718 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:25:34,718 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:25:34,718 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:25:34,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:25:34,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:25:34,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:25:34,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:25:34,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:25:34,720 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_d2154686-3535-4725-a19b-0ad32558f24d/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 -> 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 [2024-11-14 04:25:35,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:25:35,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:25:35,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:25:35,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:25:35,088 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:25:35,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c Unable to find full path for "g++" [2024-11-14 04:25:36,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:25:37,239 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:25:37,240 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2024-11-14 04:25:37,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/data/d38f43a88/ae2ef2a7549340599c3f8dd156972292/FLAG131da11ce [2024-11-14 04:25:37,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/data/d38f43a88/ae2ef2a7549340599c3f8dd156972292 [2024-11-14 04:25:37,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:25:37,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:25:37,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:25:37,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:25:37,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:25:37,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75be9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37, skipping insertion in model container [2024-11-14 04:25:37,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:25:37,489 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_d2154686-3535-4725-a19b-0ad32558f24d/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2024-11-14 04:25:37,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:25:37,664 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:25:37,673 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_d2154686-3535-4725-a19b-0ad32558f24d/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2024-11-14 04:25:37,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:25:37,748 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:25:37,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37 WrapperNode [2024-11-14 04:25:37,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:25:37,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:25:37,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:25:37,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:25:37,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,837 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 839 [2024-11-14 04:25:37,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:25:37,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:25:37,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:25:37,838 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:25:37,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,906 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:25:37,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:25:37,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:25:37,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:25:37,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (1/1) ... [2024-11-14 04:25:37,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:25:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:37,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:25:37,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:25:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:25:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:25:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 04:25:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 04:25:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:25:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:25:38,129 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:25:38,131 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:25:39,200 INFO L? ?]: Removed 87 outVars from TransFormulas that were not future-live. [2024-11-14 04:25:39,200 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:25:39,399 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:25:39,399 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-14 04:25:39,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:25:39 BoogieIcfgContainer [2024-11-14 04:25:39,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:25:39,402 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:25:39,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:25:39,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:25:39,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:25:37" (1/3) ... [2024-11-14 04:25:39,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c54b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:25:39, skipping insertion in model container [2024-11-14 04:25:39,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:25:37" (2/3) ... [2024-11-14 04:25:39,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c54b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:25:39, skipping insertion in model container [2024-11-14 04:25:39,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:25:39" (3/3) ... [2024-11-14 04:25:39,412 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2024-11-14 04:25:39,430 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:25:39,433 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG mem_slave_tlm.2.cil.c that has 2 procedures, 227 locations, 1 initial locations, 13 loop locations, and 1 error locations. [2024-11-14 04:25:39,515 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:25:39,530 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;@75b5107e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:25:39,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:25:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 219 states have (on average 1.7808219178082192) internal successors, (390), 225 states have internal predecessors, (390), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 04:25:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:25:39,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:39,552 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:39,553 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:39,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash -267833116, now seen corresponding path program 1 times [2024-11-14 04:25:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451227572] [2024-11-14 04:25:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:39,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:39,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451227572] [2024-11-14 04:25:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451227572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:39,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:39,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66030446] [2024-11-14 04:25:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:39,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:39,871 INFO L87 Difference]: Start difference. First operand has 227 states, 219 states have (on average 1.7808219178082192) internal successors, (390), 225 states have internal predecessors, (390), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:40,474 INFO L93 Difference]: Finished difference Result 612 states and 1070 transitions. [2024-11-14 04:25:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 04:25:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:40,487 INFO L225 Difference]: With dead ends: 612 [2024-11-14 04:25:40,488 INFO L226 Difference]: Without dead ends: 383 [2024-11-14 04:25:40,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:40,494 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 218 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:40,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 542 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:25:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-14 04:25:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 376. [2024-11-14 04:25:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.5243243243243243) internal successors, (564), 374 states have internal predecessors, (564), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 569 transitions. [2024-11-14 04:25:40,569 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 569 transitions. Word has length 24 [2024-11-14 04:25:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:40,569 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 569 transitions. [2024-11-14 04:25:40,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 569 transitions. [2024-11-14 04:25:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:25:40,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:40,572 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:40,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:25:40,572 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:40,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1025461842, now seen corresponding path program 1 times [2024-11-14 04:25:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66853986] [2024-11-14 04:25:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:40,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:40,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66853986] [2024-11-14 04:25:40,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66853986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:40,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:40,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:40,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683893299] [2024-11-14 04:25:40,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:40,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:40,655 INFO L87 Difference]: Start difference. First operand 376 states and 569 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:40,917 INFO L93 Difference]: Finished difference Result 973 states and 1500 transitions. [2024-11-14 04:25:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:25:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:40,921 INFO L225 Difference]: With dead ends: 973 [2024-11-14 04:25:40,921 INFO L226 Difference]: Without dead ends: 607 [2024-11-14 04:25:40,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:40,924 INFO L432 NwaCegarLoop]: 464 mSDtfsCounter, 263 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:40,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 725 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:25:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-11-14 04:25:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 600. [2024-11-14 04:25:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 594 states have (on average 1.5606060606060606) internal successors, (927), 598 states have internal predecessors, (927), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 932 transitions. [2024-11-14 04:25:40,998 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 932 transitions. Word has length 34 [2024-11-14 04:25:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:40,999 INFO L471 AbstractCegarLoop]: Abstraction has 600 states and 932 transitions. [2024-11-14 04:25:40,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 932 transitions. [2024-11-14 04:25:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:25:41,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:41,005 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:41,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:25:41,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:41,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -371093911, now seen corresponding path program 1 times [2024-11-14 04:25:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:41,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699855946] [2024-11-14 04:25:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:41,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:41,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699855946] [2024-11-14 04:25:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699855946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:41,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:41,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408219482] [2024-11-14 04:25:41,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:41,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:41,132 INFO L87 Difference]: Start difference. First operand 600 states and 932 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:41,331 INFO L93 Difference]: Finished difference Result 1532 states and 2385 transitions. [2024-11-14 04:25:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:41,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 04:25:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:41,339 INFO L225 Difference]: With dead ends: 1532 [2024-11-14 04:25:41,339 INFO L226 Difference]: Without dead ends: 942 [2024-11-14 04:25:41,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:41,341 INFO L432 NwaCegarLoop]: 321 mSDtfsCounter, 285 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:41,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 589 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:25:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2024-11-14 04:25:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 931. [2024-11-14 04:25:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 925 states have (on average 1.5567567567567568) internal successors, (1440), 929 states have internal predecessors, (1440), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1445 transitions. [2024-11-14 04:25:41,395 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1445 transitions. Word has length 35 [2024-11-14 04:25:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:41,396 INFO L471 AbstractCegarLoop]: Abstraction has 931 states and 1445 transitions. [2024-11-14 04:25:41,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1445 transitions. [2024-11-14 04:25:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:25:41,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:41,401 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:41,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:25:41,402 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:41,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1993988598, now seen corresponding path program 1 times [2024-11-14 04:25:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:41,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767228704] [2024-11-14 04:25:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:41,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:41,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:41,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767228704] [2024-11-14 04:25:41,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767228704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:41,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:41,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602151537] [2024-11-14 04:25:41,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:41,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:41,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:41,591 INFO L87 Difference]: Start difference. First operand 931 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:41,815 INFO L93 Difference]: Finished difference Result 2496 states and 3885 transitions. [2024-11-14 04:25:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:41,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-14 04:25:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:41,836 INFO L225 Difference]: With dead ends: 2496 [2024-11-14 04:25:41,837 INFO L226 Difference]: Without dead ends: 1575 [2024-11-14 04:25:41,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:41,841 INFO L432 NwaCegarLoop]: 505 mSDtfsCounter, 335 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:41,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 753 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:25:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2024-11-14 04:25:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1473. [2024-11-14 04:25:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1467 states have (on average 1.5460122699386503) internal successors, (2268), 1471 states have internal predecessors, (2268), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2273 transitions. [2024-11-14 04:25:41,920 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2273 transitions. Word has length 41 [2024-11-14 04:25:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:41,920 INFO L471 AbstractCegarLoop]: Abstraction has 1473 states and 2273 transitions. [2024-11-14 04:25:41,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2273 transitions. [2024-11-14 04:25:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:25:41,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:41,923 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:41,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:25:41,924 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:41,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash 306060959, now seen corresponding path program 1 times [2024-11-14 04:25:41,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:41,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621695545] [2024-11-14 04:25:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:42,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:42,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621695545] [2024-11-14 04:25:42,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621695545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:42,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:42,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282316833] [2024-11-14 04:25:42,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:42,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:42,051 INFO L87 Difference]: Start difference. First operand 1473 states and 2273 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:42,252 INFO L93 Difference]: Finished difference Result 3536 states and 5441 transitions. [2024-11-14 04:25:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-14 04:25:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:42,262 INFO L225 Difference]: With dead ends: 3536 [2024-11-14 04:25:42,262 INFO L226 Difference]: Without dead ends: 2073 [2024-11-14 04:25:42,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:42,266 INFO L432 NwaCegarLoop]: 322 mSDtfsCounter, 297 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:42,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 518 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2024-11-14 04:25:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1991. [2024-11-14 04:25:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1985 states have (on average 1.529471032745592) internal successors, (3036), 1989 states have internal predecessors, (3036), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3041 transitions. [2024-11-14 04:25:42,366 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3041 transitions. Word has length 48 [2024-11-14 04:25:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:42,367 INFO L471 AbstractCegarLoop]: Abstraction has 1991 states and 3041 transitions. [2024-11-14 04:25:42,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3041 transitions. [2024-11-14 04:25:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 04:25:42,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:42,369 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:42,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:25:42,369 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:42,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1471574228, now seen corresponding path program 1 times [2024-11-14 04:25:42,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641208382] [2024-11-14 04:25:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:42,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641208382] [2024-11-14 04:25:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641208382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:42,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:42,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905490630] [2024-11-14 04:25:42,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:42,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:42,537 INFO L87 Difference]: Start difference. First operand 1991 states and 3041 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:43,053 INFO L93 Difference]: Finished difference Result 4821 states and 7403 transitions. [2024-11-14 04:25:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-14 04:25:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:43,065 INFO L225 Difference]: With dead ends: 4821 [2024-11-14 04:25:43,065 INFO L226 Difference]: Without dead ends: 2840 [2024-11-14 04:25:43,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:43,068 INFO L432 NwaCegarLoop]: 416 mSDtfsCounter, 206 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:43,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 618 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:25:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2024-11-14 04:25:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2789. [2024-11-14 04:25:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2783 states have (on average 1.4638878907653612) internal successors, (4074), 2787 states have internal predecessors, (4074), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 4079 transitions. [2024-11-14 04:25:43,173 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 4079 transitions. Word has length 53 [2024-11-14 04:25:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:43,174 INFO L471 AbstractCegarLoop]: Abstraction has 2789 states and 4079 transitions. [2024-11-14 04:25:43,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 4079 transitions. [2024-11-14 04:25:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 04:25:43,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:43,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:43,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:25:43,180 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:43,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1167643112, now seen corresponding path program 1 times [2024-11-14 04:25:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808746016] [2024-11-14 04:25:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:43,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:43,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808746016] [2024-11-14 04:25:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808746016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945897173] [2024-11-14 04:25:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:43,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:43,291 INFO L87 Difference]: Start difference. First operand 2789 states and 4079 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:43,496 INFO L93 Difference]: Finished difference Result 5495 states and 8045 transitions. [2024-11-14 04:25:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-14 04:25:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:43,508 INFO L225 Difference]: With dead ends: 5495 [2024-11-14 04:25:43,508 INFO L226 Difference]: Without dead ends: 2716 [2024-11-14 04:25:43,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:43,513 INFO L432 NwaCegarLoop]: 307 mSDtfsCounter, 282 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:43,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 329 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2024-11-14 04:25:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2716. [2024-11-14 04:25:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2710 states have (on average 1.45239852398524) internal successors, (3936), 2714 states have internal predecessors, (3936), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3941 transitions. [2024-11-14 04:25:43,626 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3941 transitions. Word has length 55 [2024-11-14 04:25:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:43,627 INFO L471 AbstractCegarLoop]: Abstraction has 2716 states and 3941 transitions. [2024-11-14 04:25:43,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3941 transitions. [2024-11-14 04:25:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 04:25:43,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:43,629 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:43,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:25:43,629 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:43,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -503442305, now seen corresponding path program 1 times [2024-11-14 04:25:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:43,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917549944] [2024-11-14 04:25:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:43,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917549944] [2024-11-14 04:25:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917549944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:43,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:43,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118111507] [2024-11-14 04:25:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:43,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:43,736 INFO L87 Difference]: Start difference. First operand 2716 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:43,929 INFO L93 Difference]: Finished difference Result 5080 states and 7434 transitions. [2024-11-14 04:25:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-14 04:25:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:43,939 INFO L225 Difference]: With dead ends: 5080 [2024-11-14 04:25:43,939 INFO L226 Difference]: Without dead ends: 2374 [2024-11-14 04:25:43,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:43,943 INFO L432 NwaCegarLoop]: 368 mSDtfsCounter, 125 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:43,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 675 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2024-11-14 04:25:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2075. [2024-11-14 04:25:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2069 states have (on average 1.47269212179797) internal successors, (3047), 2073 states have internal predecessors, (3047), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 3052 transitions. [2024-11-14 04:25:44,031 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 3052 transitions. Word has length 56 [2024-11-14 04:25:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:44,031 INFO L471 AbstractCegarLoop]: Abstraction has 2075 states and 3052 transitions. [2024-11-14 04:25:44,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 3052 transitions. [2024-11-14 04:25:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:25:44,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:44,034 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:44,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:25:44,034 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:44,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash 197543013, now seen corresponding path program 1 times [2024-11-14 04:25:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:44,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437649793] [2024-11-14 04:25:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:44,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:44,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437649793] [2024-11-14 04:25:44,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437649793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:44,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:44,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370064586] [2024-11-14 04:25:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:44,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:44,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:44,123 INFO L87 Difference]: Start difference. First operand 2075 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:44,389 INFO L93 Difference]: Finished difference Result 5737 states and 8399 transitions. [2024-11-14 04:25:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:44,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-14 04:25:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:44,403 INFO L225 Difference]: With dead ends: 5737 [2024-11-14 04:25:44,404 INFO L226 Difference]: Without dead ends: 3670 [2024-11-14 04:25:44,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:44,408 INFO L432 NwaCegarLoop]: 350 mSDtfsCounter, 277 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:44,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 634 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:25:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2024-11-14 04:25:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3597. [2024-11-14 04:25:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3591 states have (on average 1.4374825953773323) internal successors, (5162), 3595 states have internal predecessors, (5162), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5167 transitions. [2024-11-14 04:25:44,577 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5167 transitions. Word has length 58 [2024-11-14 04:25:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:44,578 INFO L471 AbstractCegarLoop]: Abstraction has 3597 states and 5167 transitions. [2024-11-14 04:25:44,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5167 transitions. [2024-11-14 04:25:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:25:44,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:44,579 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:44,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:25:44,580 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:44,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 519263209, now seen corresponding path program 1 times [2024-11-14 04:25:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142067692] [2024-11-14 04:25:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:44,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:44,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142067692] [2024-11-14 04:25:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142067692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:44,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:25:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165628483] [2024-11-14 04:25:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:44,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:25:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:25:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:25:44,726 INFO L87 Difference]: Start difference. First operand 3597 states and 5167 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:45,607 INFO L93 Difference]: Finished difference Result 9866 states and 14084 transitions. [2024-11-14 04:25:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:25:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-14 04:25:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:45,631 INFO L225 Difference]: With dead ends: 9866 [2024-11-14 04:25:45,631 INFO L226 Difference]: Without dead ends: 6366 [2024-11-14 04:25:45,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:25:45,638 INFO L432 NwaCegarLoop]: 687 mSDtfsCounter, 1068 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:45,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 2827 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:25:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2024-11-14 04:25:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 4371. [2024-11-14 04:25:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4365 states have (on average 1.43184421534937) internal successors, (6250), 4369 states have internal predecessors, (6250), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6255 transitions. [2024-11-14 04:25:45,883 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6255 transitions. Word has length 58 [2024-11-14 04:25:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:45,884 INFO L471 AbstractCegarLoop]: Abstraction has 4371 states and 6255 transitions. [2024-11-14 04:25:45,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6255 transitions. [2024-11-14 04:25:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 04:25:45,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:45,886 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:45,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 04:25:45,886 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:45,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -581968338, now seen corresponding path program 1 times [2024-11-14 04:25:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532686283] [2024-11-14 04:25:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:46,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:46,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532686283] [2024-11-14 04:25:46,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532686283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:46,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:46,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:25:46,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026062079] [2024-11-14 04:25:46,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:46,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:25:46,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:46,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:25:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:25:46,064 INFO L87 Difference]: Start difference. First operand 4371 states and 6255 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:46,674 INFO L93 Difference]: Finished difference Result 10664 states and 15162 transitions. [2024-11-14 04:25:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:25:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-14 04:25:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:46,716 INFO L225 Difference]: With dead ends: 10664 [2024-11-14 04:25:46,716 INFO L226 Difference]: Without dead ends: 6390 [2024-11-14 04:25:46,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:25:46,723 INFO L432 NwaCegarLoop]: 405 mSDtfsCounter, 687 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:46,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2202 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:25:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2024-11-14 04:25:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 4655. [2024-11-14 04:25:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4649 states have (on average 1.4226715422671543) internal successors, (6614), 4653 states have internal predecessors, (6614), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6619 transitions. [2024-11-14 04:25:46,981 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 6619 transitions. Word has length 59 [2024-11-14 04:25:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:46,981 INFO L471 AbstractCegarLoop]: Abstraction has 4655 states and 6619 transitions. [2024-11-14 04:25:46,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 6619 transitions. [2024-11-14 04:25:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 04:25:46,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:46,983 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:46,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:25:46,984 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:46,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1626366951, now seen corresponding path program 1 times [2024-11-14 04:25:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959241401] [2024-11-14 04:25:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:47,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959241401] [2024-11-14 04:25:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959241401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:47,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:25:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100731240] [2024-11-14 04:25:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:47,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:47,044 INFO L87 Difference]: Start difference. First operand 4655 states and 6619 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:47,404 INFO L93 Difference]: Finished difference Result 9803 states and 13895 transitions. [2024-11-14 04:25:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-14 04:25:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:47,431 INFO L225 Difference]: With dead ends: 9803 [2024-11-14 04:25:47,431 INFO L226 Difference]: Without dead ends: 5172 [2024-11-14 04:25:47,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:47,439 INFO L432 NwaCegarLoop]: 332 mSDtfsCounter, 122 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:47,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 616 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:25:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2024-11-14 04:25:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4706. [2024-11-14 04:25:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4700 states have (on average 1.4195744680851063) internal successors, (6672), 4704 states have internal predecessors, (6672), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 6677 transitions. [2024-11-14 04:25:47,681 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 6677 transitions. Word has length 72 [2024-11-14 04:25:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:47,681 INFO L471 AbstractCegarLoop]: Abstraction has 4706 states and 6677 transitions. [2024-11-14 04:25:47,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 6677 transitions. [2024-11-14 04:25:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 04:25:47,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:47,688 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:47,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:25:47,688 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:47,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -56179030, now seen corresponding path program 1 times [2024-11-14 04:25:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527373792] [2024-11-14 04:25:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:47,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527373792] [2024-11-14 04:25:47,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527373792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:47,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:47,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:47,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901680822] [2024-11-14 04:25:47,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:47,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:47,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:47,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:47,787 INFO L87 Difference]: Start difference. First operand 4706 states and 6677 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:48,100 INFO L93 Difference]: Finished difference Result 10451 states and 14874 transitions. [2024-11-14 04:25:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-14 04:25:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:48,119 INFO L225 Difference]: With dead ends: 10451 [2024-11-14 04:25:48,119 INFO L226 Difference]: Without dead ends: 5822 [2024-11-14 04:25:48,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:48,126 INFO L432 NwaCegarLoop]: 407 mSDtfsCounter, 147 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:48,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 703 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2024-11-14 04:25:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4975. [2024-11-14 04:25:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4969 states have (on average 1.4155765747635338) internal successors, (7034), 4973 states have internal predecessors, (7034), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 7039 transitions. [2024-11-14 04:25:48,373 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 7039 transitions. Word has length 83 [2024-11-14 04:25:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:48,374 INFO L471 AbstractCegarLoop]: Abstraction has 4975 states and 7039 transitions. [2024-11-14 04:25:48,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 7039 transitions. [2024-11-14 04:25:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 04:25:48,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:48,377 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:48,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 04:25:48,377 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:48,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:48,378 INFO L85 PathProgramCache]: Analyzing trace with hash 479879908, now seen corresponding path program 1 times [2024-11-14 04:25:48,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:48,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534203673] [2024-11-14 04:25:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:25:48,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:48,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534203673] [2024-11-14 04:25:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534203673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:48,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:48,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:25:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788073224] [2024-11-14 04:25:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:48,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:48,446 INFO L87 Difference]: Start difference. First operand 4975 states and 7039 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:48,671 INFO L93 Difference]: Finished difference Result 7303 states and 10408 transitions. [2024-11-14 04:25:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-14 04:25:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:48,680 INFO L225 Difference]: With dead ends: 7303 [2024-11-14 04:25:48,680 INFO L226 Difference]: Without dead ends: 2296 [2024-11-14 04:25:48,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:25:48,687 INFO L432 NwaCegarLoop]: 369 mSDtfsCounter, 309 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:48,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 448 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2024-11-14 04:25:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2260. [2024-11-14 04:25:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2254 states have (on average 1.3673469387755102) internal successors, (3082), 2258 states have internal predecessors, (3082), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3087 transitions. [2024-11-14 04:25:48,779 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3087 transitions. Word has length 89 [2024-11-14 04:25:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:48,779 INFO L471 AbstractCegarLoop]: Abstraction has 2260 states and 3087 transitions. [2024-11-14 04:25:48,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3087 transitions. [2024-11-14 04:25:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 04:25:48,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:48,781 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:48,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:25:48,781 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:48,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash 74660766, now seen corresponding path program 1 times [2024-11-14 04:25:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:48,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424168293] [2024-11-14 04:25:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:48,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:48,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:48,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424168293] [2024-11-14 04:25:48,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424168293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:48,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:48,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:25:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568097086] [2024-11-14 04:25:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:48,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:25:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:25:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:25:48,913 INFO L87 Difference]: Start difference. First operand 2260 states and 3087 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:49,313 INFO L93 Difference]: Finished difference Result 5177 states and 7079 transitions. [2024-11-14 04:25:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:25:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 04:25:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:49,327 INFO L225 Difference]: With dead ends: 5177 [2024-11-14 04:25:49,327 INFO L226 Difference]: Without dead ends: 3046 [2024-11-14 04:25:49,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:25:49,332 INFO L432 NwaCegarLoop]: 544 mSDtfsCounter, 486 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:49,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1826 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:25:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2024-11-14 04:25:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2262. [2024-11-14 04:25:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3643617021276595) internal successors, (3078), 2260 states have internal predecessors, (3078), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3083 transitions. [2024-11-14 04:25:49,428 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3083 transitions. Word has length 93 [2024-11-14 04:25:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:49,429 INFO L471 AbstractCegarLoop]: Abstraction has 2262 states and 3083 transitions. [2024-11-14 04:25:49,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3083 transitions. [2024-11-14 04:25:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 04:25:49,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:49,431 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:49,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 04:25:49,431 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:49,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1332848889, now seen corresponding path program 1 times [2024-11-14 04:25:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:49,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107268990] [2024-11-14 04:25:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:49,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107268990] [2024-11-14 04:25:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107268990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873109848] [2024-11-14 04:25:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:49,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:49,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:25:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:49,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:25:49,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:49,915 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:25:49,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873109848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:49,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:25:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 04:25:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258396599] [2024-11-14 04:25:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:49,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:49,918 INFO L87 Difference]: Start difference. First operand 2262 states and 3083 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:50,171 INFO L93 Difference]: Finished difference Result 2283 states and 3102 transitions. [2024-11-14 04:25:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-14 04:25:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:50,181 INFO L225 Difference]: With dead ends: 2283 [2024-11-14 04:25:50,181 INFO L226 Difference]: Without dead ends: 2279 [2024-11-14 04:25:50,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:50,184 INFO L432 NwaCegarLoop]: 331 mSDtfsCounter, 201 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:50,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 623 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2024-11-14 04:25:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2262. [2024-11-14 04:25:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3585992907801419) internal successors, (3065), 2260 states have internal predecessors, (3065), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3070 transitions. [2024-11-14 04:25:50,329 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3070 transitions. Word has length 95 [2024-11-14 04:25:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:50,330 INFO L471 AbstractCegarLoop]: Abstraction has 2262 states and 3070 transitions. [2024-11-14 04:25:50,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3070 transitions. [2024-11-14 04:25:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 04:25:50,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:50,335 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:50,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:25:50,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:25:50,536 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:50,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796225, now seen corresponding path program 1 times [2024-11-14 04:25:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491255856] [2024-11-14 04:25:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:50,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:50,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491255856] [2024-11-14 04:25:50,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491255856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:50,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626364182] [2024-11-14 04:25:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:50,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:50,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:25:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:50,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:25:50,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:51,053 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:25:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626364182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:25:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 04:25:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828111358] [2024-11-14 04:25:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:51,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:51,055 INFO L87 Difference]: Start difference. First operand 2262 states and 3070 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:51,231 INFO L93 Difference]: Finished difference Result 4373 states and 5972 transitions. [2024-11-14 04:25:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2024-11-14 04:25:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:51,239 INFO L225 Difference]: With dead ends: 4373 [2024-11-14 04:25:51,239 INFO L226 Difference]: Without dead ends: 2262 [2024-11-14 04:25:51,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:51,243 INFO L432 NwaCegarLoop]: 292 mSDtfsCounter, 230 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:51,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 333 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2024-11-14 04:25:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2024-11-14 04:25:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3275709219858156) internal successors, (2995), 2260 states have internal predecessors, (2995), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3000 transitions. [2024-11-14 04:25:51,352 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3000 transitions. Word has length 146 [2024-11-14 04:25:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:51,352 INFO L471 AbstractCegarLoop]: Abstraction has 2262 states and 3000 transitions. [2024-11-14 04:25:51,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3000 transitions. [2024-11-14 04:25:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 04:25:51,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:51,355 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:51,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:25:51,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:25:51,556 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:51,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -547784016, now seen corresponding path program 1 times [2024-11-14 04:25:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88025338] [2024-11-14 04:25:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:51,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:51,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88025338] [2024-11-14 04:25:51,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88025338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418607080] [2024-11-14 04:25:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:51,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:51,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:25:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:51,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:25:51,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:25:52,011 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:25:52,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418607080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:52,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:25:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 04:25:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66166063] [2024-11-14 04:25:52,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:52,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:52,013 INFO L87 Difference]: Start difference. First operand 2262 states and 3000 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:52,216 INFO L93 Difference]: Finished difference Result 4373 states and 5832 transitions. [2024-11-14 04:25:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-11-14 04:25:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:52,224 INFO L225 Difference]: With dead ends: 4373 [2024-11-14 04:25:52,225 INFO L226 Difference]: Without dead ends: 2262 [2024-11-14 04:25:52,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:52,228 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 240 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:52,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 305 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:25:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2024-11-14 04:25:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2024-11-14 04:25:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.2965425531914894) internal successors, (2925), 2260 states have internal predecessors, (2925), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2930 transitions. [2024-11-14 04:25:52,327 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2930 transitions. Word has length 149 [2024-11-14 04:25:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:52,330 INFO L471 AbstractCegarLoop]: Abstraction has 2262 states and 2930 transitions. [2024-11-14 04:25:52,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2930 transitions. [2024-11-14 04:25:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 04:25:52,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:52,334 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:52,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:25:52,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:25:52,535 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:52,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1020245857, now seen corresponding path program 1 times [2024-11-14 04:25:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:52,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252092196] [2024-11-14 04:25:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:52,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252092196] [2024-11-14 04:25:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252092196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802524765] [2024-11-14 04:25:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:52,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:52,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:52,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:52,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:25:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:52,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:25:52,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:25:52,954 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:25:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802524765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:25:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 04:25:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793426596] [2024-11-14 04:25:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:52,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:25:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:25:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:52,956 INFO L87 Difference]: Start difference. First operand 2262 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:53,439 INFO L93 Difference]: Finished difference Result 5024 states and 6632 transitions. [2024-11-14 04:25:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:25:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2024-11-14 04:25:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:53,449 INFO L225 Difference]: With dead ends: 5024 [2024-11-14 04:25:53,449 INFO L226 Difference]: Without dead ends: 2913 [2024-11-14 04:25:53,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:53,453 INFO L432 NwaCegarLoop]: 354 mSDtfsCounter, 173 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:53,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 536 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:25:53,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2024-11-14 04:25:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2750. [2024-11-14 04:25:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2744 states have (on average 1.2744169096209912) internal successors, (3497), 2748 states have internal predecessors, (3497), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3502 transitions. [2024-11-14 04:25:53,566 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3502 transitions. Word has length 150 [2024-11-14 04:25:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:53,567 INFO L471 AbstractCegarLoop]: Abstraction has 2750 states and 3502 transitions. [2024-11-14 04:25:53,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3502 transitions. [2024-11-14 04:25:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 04:25:53,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:53,570 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:53,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:25:53,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:53,771 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:53,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 990451535, now seen corresponding path program 1 times [2024-11-14 04:25:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925060188] [2024-11-14 04:25:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:54,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925060188] [2024-11-14 04:25:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925060188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46637128] [2024-11-14 04:25:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:54,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:25:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:54,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:25:54,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:54,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:25:54,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46637128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:54,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013212052] [2024-11-14 04:25:54,870 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2024-11-14 04:25:54,870 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:54,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:54,879 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:54,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:26:22,845 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 3 for LOIs [2024-11-14 04:26:22,847 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:26:49,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169373#(= ~c_read_req_ev~0 2)' at error location [2024-11-14 04:26:49,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:26:49,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:26:49,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2024-11-14 04:26:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652170267] [2024-11-14 04:26:49,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:26:49,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:26:49,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:26:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4236, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 04:26:49,883 INFO L87 Difference]: Start difference. First operand 2750 states and 3502 transitions. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:50,613 INFO L93 Difference]: Finished difference Result 7241 states and 9238 transitions. [2024-11-14 04:26:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:26:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2024-11-14 04:26:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:50,626 INFO L225 Difference]: With dead ends: 7241 [2024-11-14 04:26:50,626 INFO L226 Difference]: Without dead ends: 4642 [2024-11-14 04:26:50,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 382 SyntacticMatches, 16 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=375, Invalid=5477, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 04:26:50,635 INFO L432 NwaCegarLoop]: 449 mSDtfsCounter, 910 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:50,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 3172 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:26:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2024-11-14 04:26:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 4022. [2024-11-14 04:26:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4022 states, 4016 states have (on average 1.277390438247012) internal successors, (5130), 4020 states have internal predecessors, (5130), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5135 transitions. [2024-11-14 04:26:50,799 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5135 transitions. Word has length 152 [2024-11-14 04:26:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:50,799 INFO L471 AbstractCegarLoop]: Abstraction has 4022 states and 5135 transitions. [2024-11-14 04:26:50,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5135 transitions. [2024-11-14 04:26:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-14 04:26:50,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:50,804 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:50,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:26:51,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:51,006 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:51,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 779654330, now seen corresponding path program 1 times [2024-11-14 04:26:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:51,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695213661] [2024-11-14 04:26:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 99 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:26:51,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695213661] [2024-11-14 04:26:51,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695213661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24068102] [2024-11-14 04:26:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:51,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:51,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:26:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:51,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:26:51,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:26:51,883 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:26:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24068102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:51,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:26:51,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2024-11-14 04:26:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268836357] [2024-11-14 04:26:51,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:51,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:26:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:26:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:26:51,885 INFO L87 Difference]: Start difference. First operand 4022 states and 5135 transitions. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:52,430 INFO L93 Difference]: Finished difference Result 8187 states and 10473 transitions. [2024-11-14 04:26:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:26:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2024-11-14 04:26:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:52,444 INFO L225 Difference]: With dead ends: 8187 [2024-11-14 04:26:52,445 INFO L226 Difference]: Without dead ends: 4316 [2024-11-14 04:26:52,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:26:52,451 INFO L432 NwaCegarLoop]: 600 mSDtfsCounter, 883 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:52,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 2222 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:26:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2024-11-14 04:26:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3913. [2024-11-14 04:26:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3907 states have (on average 1.2782185820322498) internal successors, (4994), 3911 states have internal predecessors, (4994), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 4999 transitions. [2024-11-14 04:26:52,614 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 4999 transitions. Word has length 247 [2024-11-14 04:26:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:52,614 INFO L471 AbstractCegarLoop]: Abstraction has 3913 states and 4999 transitions. [2024-11-14 04:26:52,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 4999 transitions. [2024-11-14 04:26:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-14 04:26:52,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:52,619 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:52,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:26:52,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:52,820 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:52,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1628097534, now seen corresponding path program 1 times [2024-11-14 04:26:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:52,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144701672] [2024-11-14 04:26:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:52,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-14 04:26:53,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144701672] [2024-11-14 04:26:53,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144701672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:53,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:26:53,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:26:53,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194120650] [2024-11-14 04:26:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:53,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:26:53,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:26:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:26:53,109 INFO L87 Difference]: Start difference. First operand 3913 states and 4999 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:53,671 INFO L93 Difference]: Finished difference Result 8583 states and 10977 transitions. [2024-11-14 04:26:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:26:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2024-11-14 04:26:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:53,685 INFO L225 Difference]: With dead ends: 8583 [2024-11-14 04:26:53,685 INFO L226 Difference]: Without dead ends: 4821 [2024-11-14 04:26:53,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:26:53,691 INFO L432 NwaCegarLoop]: 429 mSDtfsCounter, 418 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:53,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 2349 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:26:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2024-11-14 04:26:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 4190. [2024-11-14 04:26:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4184 states have (on average 1.2796367112810707) internal successors, (5354), 4188 states have internal predecessors, (5354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 5359 transitions. [2024-11-14 04:26:53,862 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 5359 transitions. Word has length 248 [2024-11-14 04:26:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:53,863 INFO L471 AbstractCegarLoop]: Abstraction has 4190 states and 5359 transitions. [2024-11-14 04:26:53,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 5359 transitions. [2024-11-14 04:26:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-14 04:26:53,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:53,867 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:53,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-14 04:26:53,867 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:53,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -567842631, now seen corresponding path program 1 times [2024-11-14 04:26:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019983874] [2024-11-14 04:26:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-14 04:26:54,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:54,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019983874] [2024-11-14 04:26:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019983874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:54,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:26:54,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:26:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560665021] [2024-11-14 04:26:54,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:54,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:26:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:26:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:26:54,086 INFO L87 Difference]: Start difference. First operand 4190 states and 5359 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:54,531 INFO L93 Difference]: Finished difference Result 9703 states and 12346 transitions. [2024-11-14 04:26:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:26:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2024-11-14 04:26:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:54,547 INFO L225 Difference]: With dead ends: 9703 [2024-11-14 04:26:54,547 INFO L226 Difference]: Without dead ends: 5664 [2024-11-14 04:26:54,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:26:54,553 INFO L432 NwaCegarLoop]: 378 mSDtfsCounter, 309 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:54,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1374 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:26:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2024-11-14 04:26:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 4533. [2024-11-14 04:26:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4527 states have (on average 1.2767837419924895) internal successors, (5780), 4531 states have internal predecessors, (5780), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 5785 transitions. [2024-11-14 04:26:54,743 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 5785 transitions. Word has length 249 [2024-11-14 04:26:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:54,743 INFO L471 AbstractCegarLoop]: Abstraction has 4533 states and 5785 transitions. [2024-11-14 04:26:54,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 5785 transitions. [2024-11-14 04:26:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2024-11-14 04:26:54,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:54,749 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:54,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-14 04:26:54,750 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:54,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1854884934, now seen corresponding path program 1 times [2024-11-14 04:26:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175368192] [2024-11-14 04:26:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-14 04:26:54,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:54,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175368192] [2024-11-14 04:26:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175368192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:54,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:26:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:26:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983083716] [2024-11-14 04:26:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:54,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:26:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:26:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:26:54,857 INFO L87 Difference]: Start difference. First operand 4533 states and 5785 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:55,207 INFO L93 Difference]: Finished difference Result 10934 states and 14042 transitions. [2024-11-14 04:26:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:26:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2024-11-14 04:26:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:55,226 INFO L225 Difference]: With dead ends: 10934 [2024-11-14 04:26:55,226 INFO L226 Difference]: Without dead ends: 6411 [2024-11-14 04:26:55,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:26:55,233 INFO L432 NwaCegarLoop]: 378 mSDtfsCounter, 205 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:55,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 645 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:26:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2024-11-14 04:26:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 6350. [2024-11-14 04:26:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6350 states, 6344 states have (on average 1.2725409836065573) internal successors, (8073), 6348 states have internal predecessors, (8073), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 8078 transitions. [2024-11-14 04:26:55,498 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 8078 transitions. Word has length 287 [2024-11-14 04:26:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:55,498 INFO L471 AbstractCegarLoop]: Abstraction has 6350 states and 8078 transitions. [2024-11-14 04:26:55,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 8078 transitions. [2024-11-14 04:26:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2024-11-14 04:26:55,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:55,505 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:55,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 04:26:55,507 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:55,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1873398503, now seen corresponding path program 1 times [2024-11-14 04:26:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:55,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036013912] [2024-11-14 04:26:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-14 04:26:55,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036013912] [2024-11-14 04:26:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036013912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:55,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:26:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:26:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244645485] [2024-11-14 04:26:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:55,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:26:55,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:26:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:26:55,663 INFO L87 Difference]: Start difference. First operand 6350 states and 8078 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:55,935 INFO L93 Difference]: Finished difference Result 11041 states and 14051 transitions. [2024-11-14 04:26:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:26:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2024-11-14 04:26:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:55,950 INFO L225 Difference]: With dead ends: 11041 [2024-11-14 04:26:55,950 INFO L226 Difference]: Without dead ends: 4828 [2024-11-14 04:26:55,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:26:55,958 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 34 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:55,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 512 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:26:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2024-11-14 04:26:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4356. [2024-11-14 04:26:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4350 states have (on average 1.2629885057471264) internal successors, (5494), 4354 states have internal predecessors, (5494), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 5499 transitions. [2024-11-14 04:26:56,145 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 5499 transitions. Word has length 288 [2024-11-14 04:26:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:56,146 INFO L471 AbstractCegarLoop]: Abstraction has 4356 states and 5499 transitions. [2024-11-14 04:26:56,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 5499 transitions. [2024-11-14 04:26:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2024-11-14 04:26:56,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:56,153 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:56,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-14 04:26:56,153 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:56,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -404166186, now seen corresponding path program 1 times [2024-11-14 04:26:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313178079] [2024-11-14 04:26:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 161 proven. 45 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:26:56,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313178079] [2024-11-14 04:26:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313178079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062981599] [2024-11-14 04:26:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:56,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:56,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:26:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:56,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:26:56,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-14 04:26:56,724 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:26:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062981599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:56,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:26:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 04:26:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588044857] [2024-11-14 04:26:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:56,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:26:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:26:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:26:56,726 INFO L87 Difference]: Start difference. First operand 4356 states and 5499 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:56,984 INFO L93 Difference]: Finished difference Result 8493 states and 10749 transitions. [2024-11-14 04:26:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:26:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2024-11-14 04:26:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:56,997 INFO L225 Difference]: With dead ends: 8493 [2024-11-14 04:26:56,997 INFO L226 Difference]: Without dead ends: 4274 [2024-11-14 04:26:57,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:26:57,002 INFO L432 NwaCegarLoop]: 250 mSDtfsCounter, 184 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:57,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 266 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:26:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2024-11-14 04:26:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 4274. [2024-11-14 04:26:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4268 states have (on average 1.2446110590440487) internal successors, (5312), 4272 states have internal predecessors, (5312), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 5317 transitions. [2024-11-14 04:26:57,165 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 5317 transitions. Word has length 289 [2024-11-14 04:26:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:57,166 INFO L471 AbstractCegarLoop]: Abstraction has 4274 states and 5317 transitions. [2024-11-14 04:26:57,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 5317 transitions. [2024-11-14 04:26:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2024-11-14 04:26:57,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:57,172 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:57,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:26:57,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:26:57,373 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:57,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash -467531511, now seen corresponding path program 1 times [2024-11-14 04:26:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:57,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758833274] [2024-11-14 04:26:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 169 proven. 45 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:26:57,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758833274] [2024-11-14 04:26:57,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758833274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079776519] [2024-11-14 04:26:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:57,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:26:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:57,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:26:57,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-14 04:26:57,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:26:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079776519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:26:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:26:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 04:26:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403405512] [2024-11-14 04:26:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:26:57,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:26:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:26:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:26:57,782 INFO L87 Difference]: Start difference. First operand 4274 states and 5317 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:58,019 INFO L93 Difference]: Finished difference Result 7587 states and 9461 transitions. [2024-11-14 04:26:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:26:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2024-11-14 04:26:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:58,031 INFO L225 Difference]: With dead ends: 7587 [2024-11-14 04:26:58,032 INFO L226 Difference]: Without dead ends: 3371 [2024-11-14 04:26:58,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:26:58,036 INFO L432 NwaCegarLoop]: 281 mSDtfsCounter, 47 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:58,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 533 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:26:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2024-11-14 04:26:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3263. [2024-11-14 04:26:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3257 states have (on average 1.2311943506294136) internal successors, (4010), 3261 states have internal predecessors, (4010), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4015 transitions. [2024-11-14 04:26:58,242 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4015 transitions. Word has length 292 [2024-11-14 04:26:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:58,243 INFO L471 AbstractCegarLoop]: Abstraction has 3263 states and 4015 transitions. [2024-11-14 04:26:58,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4015 transitions. [2024-11-14 04:26:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-14 04:26:58,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:58,249 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:58,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:26:58,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:26:58,450 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:26:58,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:58,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2126495574, now seen corresponding path program 1 times [2024-11-14 04:26:58,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867997011] [2024-11-14 04:26:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:58,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 39 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 04:26:59,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867997011] [2024-11-14 04:26:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867997011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130664654] [2024-11-14 04:26:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:59,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:59,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:59,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2154686-3535-4725-a19b-0ad32558f24d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:26:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:59,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:26:59,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:27:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 39 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 04:27:00,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:27:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 15 proven. 143 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 04:27:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130664654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:27:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339873968] [2024-11-14 04:27:00,586 INFO L159 IcfgInterpreter]: Started Sifa with 159 locations of interest [2024-11-14 04:27:00,587 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:27:00,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:27:00,587 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:27:00,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs