./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.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_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/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_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/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_b8cf4f65-8781-4228-8af5-24787294ce52/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 a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:42:03,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:42:03,594 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:42:03,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:42:03,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:42:03,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:42:03,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:42:03,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:42:03,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:42:03,633 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:42:03,633 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:42:03,634 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:42:03,634 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:42:03,634 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:42:03,634 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:42:03,634 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:42:03,634 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:42:03,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:42:03,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:42:03,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:03,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:42:03,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:42:03,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:42:03,637 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_b8cf4f65-8781-4228-8af5-24787294ce52/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 -> a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a [2024-11-14 02:42:03,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:42:03,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:42:03,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:42:03,940 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:42:03,942 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:42:03,945 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c Unable to find full path for "g++" [2024-11-14 02:42:05,819 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:42:06,180 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:42:06,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2024-11-14 02:42:06,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/0b37e40a0/67f2fd41463e4b67b0dc3b0993d75fa1/FLAGdfa6227d0 [2024-11-14 02:42:06,221 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/0b37e40a0/67f2fd41463e4b67b0dc3b0993d75fa1 [2024-11-14 02:42:06,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:42:06,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:42:06,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:06,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:42:06,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:42:06,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610be90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06, skipping insertion in model container [2024-11-14 02:42:06,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,286 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:42:06,594 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_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2024-11-14 02:42:06,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:06,612 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:42:06,689 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_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2024-11-14 02:42:06,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:06,712 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:42:06,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06 WrapperNode [2024-11-14 02:42:06,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:06,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:06,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:42:06,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:42:06,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,799 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 530 [2024-11-14 02:42:06,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:06,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:42:06,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:42:06,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:42:06,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,838 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:42:06,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:42:06,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:42:06,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:42:06,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (1/1) ... [2024-11-14 02:42:06,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:06,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:42:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:42:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:42:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:42:06,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:42:06,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:42:07,131 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:42:07,134 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:42:07,933 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-14 02:42:07,933 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:42:09,106 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:42:09,107 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 02:42:09,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:09 BoogieIcfgContainer [2024-11-14 02:42:09,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:42:09,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:42:09,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:42:09,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:42:09,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:42:06" (1/3) ... [2024-11-14 02:42:09,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe141f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:09, skipping insertion in model container [2024-11-14 02:42:09,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:06" (2/3) ... [2024-11-14 02:42:09,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe141f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:09, skipping insertion in model container [2024-11-14 02:42:09,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:09" (3/3) ... [2024-11-14 02:42:09,121 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2024-11-14 02:42:09,139 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:42:09,143 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c that has 1 procedures, 12 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 02:42:09,215 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:42:09,234 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;@5b418249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:42:09,235 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:42:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:42:09,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:09,249 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 02:42:09,250 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:09,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 704767138, now seen corresponding path program 1 times [2024-11-14 02:42:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:09,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782791760] [2024-11-14 02:42:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:13,422 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 02:42:13,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782791760] [2024-11-14 02:42:13,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782791760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:13,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:13,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:42:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163411746] [2024-11-14 02:42:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:13,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:13,463 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:13,591 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2024-11-14 02:42:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:13,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 02:42:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:13,605 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:42:13,605 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:42:13,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:13,612 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:13,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:42:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2024-11-14 02:42:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-14 02:42:13,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2024-11-14 02:42:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:13,649 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-14 02:42:13,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-14 02:42:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:42:13,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:13,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:13,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:42:13,653 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:13,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2082085110, now seen corresponding path program 1 times [2024-11-14 02:42:13,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:13,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032442564] [2024-11-14 02:42:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:16,026 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 02:42:16,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032442564] [2024-11-14 02:42:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032442564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:16,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:16,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:42:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820540765] [2024-11-14 02:42:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:16,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:16,031 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:16,126 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-14 02:42:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:42:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:16,127 INFO L225 Difference]: With dead ends: 32 [2024-11-14 02:42:16,128 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:42:16,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:16,129 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:16,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:42:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2024-11-14 02:42:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-11-14 02:42:16,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2024-11-14 02:42:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:16,138 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-11-14 02:42:16,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-11-14 02:42:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:42:16,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:16,139 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:16,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:42:16,140 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:16,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2080744515, now seen corresponding path program 1 times [2024-11-14 02:42:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767098598] [2024-11-14 02:42:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:16,707 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 02:42:16,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767098598] [2024-11-14 02:42:16,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767098598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:16,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:16,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:42:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612788425] [2024-11-14 02:42:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:16,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:16,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:16,710 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:16,783 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-14 02:42:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:42:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:16,784 INFO L225 Difference]: With dead ends: 32 [2024-11-14 02:42:16,784 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:42:16,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:16,785 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:16,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 25 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:42:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2024-11-14 02:42:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-14 02:42:16,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2024-11-14 02:42:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:16,797 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-14 02:42:16,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-14 02:42:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 02:42:16,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:16,799 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:16,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:42:16,800 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:16,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -130715731, now seen corresponding path program 1 times [2024-11-14 02:42:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242240479] [2024-11-14 02:42:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:16,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:19,076 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 02:42:19,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242240479] [2024-11-14 02:42:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242240479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:19,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:42:19,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073334328] [2024-11-14 02:42:19,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:19,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:42:19,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:42:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:42:19,078 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:19,193 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-14 02:42:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:42:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 02:42:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:19,195 INFO L225 Difference]: With dead ends: 26 [2024-11-14 02:42:19,195 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:42:19,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 02:42:19,196 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:19,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:42:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-11-14 02:42:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-14 02:42:19,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2024-11-14 02:42:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:19,208 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-14 02:42:19,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-14 02:42:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:42:19,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:19,210 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:19,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:42:19,210 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:19,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1387393671, now seen corresponding path program 1 times [2024-11-14 02:42:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454889955] [2024-11-14 02:42:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:19,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:36,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454889955] [2024-11-14 02:42:36,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454889955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958289103] [2024-11-14 02:42:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:36,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:36,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:36,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:42:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:37,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 02:42:37,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:55,291 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 02:42:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:58,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:46:35,216 WARN L286 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 432 DAG size of output: 779 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 02:53:44,434 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 02:53:44,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2024-11-14 02:53:44,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-14 02:53:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143263415] [2024-11-14 02:53:44,458 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:53:44,458 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:44,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:44,468 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:44,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:44,502 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-14 02:53:44,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:53:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2024-11-14 02:53:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565461001] [2024-11-14 02:53:44,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:44,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:53:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:53:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:53:44,508 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:44,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:53:44,511 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:44,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:53:44,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:53:44,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:44,716 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2024-11-14 02:53:44,720 INFO L158 Benchmark]: Toolchain (without parser) took 698491.68ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 117.6MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 225.3MB. Max. memory is 16.1GB. [2024-11-14 02:53:44,720 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:53:44,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 482.88ms. Allocated memory is still 142.6MB. Free memory was 117.4MB in the beginning and 99.1MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 02:53:44,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.68ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 95.8MB in the end (delta: 3.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:53:44,721 INFO L158 Benchmark]: Boogie Preprocessor took 80.25ms. Allocated memory is still 142.6MB. Free memory was 95.8MB in the beginning and 93.4MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 02:53:44,721 INFO L158 Benchmark]: RCFGBuilder took 2226.31ms. Allocated memory is still 142.6MB. Free memory was 93.4MB in the beginning and 72.9MB in the end (delta: 20.5MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. [2024-11-14 02:53:44,722 INFO L158 Benchmark]: TraceAbstraction took 695608.91ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 71.7MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 184.8MB. Max. memory is 16.1GB. [2024-11-14 02:53:44,724 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 482.88ms. Allocated memory is still 142.6MB. Free memory was 117.4MB in the beginning and 99.1MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.68ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 95.8MB in the end (delta: 3.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 80.25ms. Allocated memory is still 142.6MB. Free memory was 95.8MB in the beginning and 93.4MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2226.31ms. Allocated memory is still 142.6MB. Free memory was 93.4MB in the beginning and 72.9MB in the end (delta: 20.5MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. * TraceAbstraction took 695608.91ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 71.7MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 184.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/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_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/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 a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:53:47,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:53:47,781 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-14 02:53:47,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:53:47,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:53:47,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:53:47,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:53:47,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:53:47,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:53:47,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:53:47,849 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:53:47,849 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:53:47,849 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:53:47,852 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:53:47,853 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:53:47,853 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:53:47,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:53:47,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 02:53:47,854 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:53:47,855 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 02:53:47,855 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:53:47,855 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:53:47,855 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:53:47,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:53:47,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 02:53:47,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:53:47,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:53:47,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:53:47,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:53:47,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b8cf4f65-8781-4228-8af5-24787294ce52/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 -> a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a [2024-11-14 02:53:48,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:53:48,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:53:48,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:53:48,239 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:53:48,239 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:53:48,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c Unable to find full path for "g++" [2024-11-14 02:53:50,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:53:51,049 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:53:51,050 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2024-11-14 02:53:51,067 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/1d51c0e43/e0748e393fcb4a98bee9a5063c33f9c6/FLAG060e5d8b9 [2024-11-14 02:53:51,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/data/1d51c0e43/e0748e393fcb4a98bee9a5063c33f9c6 [2024-11-14 02:53:51,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:53:51,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:53:51,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:53:51,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:53:51,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:53:51,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31fed458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51, skipping insertion in model container [2024-11-14 02:53:51,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,171 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:53:51,579 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_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2024-11-14 02:53:51,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:53:51,615 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:53:51,739 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_b8cf4f65-8781-4228-8af5-24787294ce52/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2024-11-14 02:53:51,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:53:51,775 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:53:51,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51 WrapperNode [2024-11-14 02:53:51,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:53:51,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:53:51,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:53:51,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:53:51,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,881 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 504 [2024-11-14 02:53:51,885 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:53:51,886 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:53:51,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:53:51,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:53:51,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:53:51,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:53:51,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:53:51,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:53:51,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (1/1) ... [2024-11-14 02:53:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:53:51,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:52,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:53:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:53:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:53:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 02:53:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:53:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:53:52,222 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:53:52,224 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:53:53,223 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-14 02:53:53,223 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:53:53,246 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:53:53,247 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 02:53:53,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:53:53 BoogieIcfgContainer [2024-11-14 02:53:53,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:53:53,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:53:53,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:53:53,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:53:53,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:53:51" (1/3) ... [2024-11-14 02:53:53,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c31925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:53:53, skipping insertion in model container [2024-11-14 02:53:53,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:51" (2/3) ... [2024-11-14 02:53:53,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c31925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:53:53, skipping insertion in model container [2024-11-14 02:53:53,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:53:53" (3/3) ... [2024-11-14 02:53:53,277 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2024-11-14 02:53:53,298 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:53:53,301 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c that has 1 procedures, 133 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 02:53:53,387 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:53:53,407 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;@5ed70e65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:53:53,407 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:53:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 1.7938931297709924) internal successors, (235), 132 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 02:53:53,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:53,427 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] [2024-11-14 02:53:53,428 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:53,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1943104143, now seen corresponding path program 1 times [2024-11-14 02:53:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:53:53,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287736441] [2024-11-14 02:53:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:53:53,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:53:53,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 02:53:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:53,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-14 02:53:53,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:53,775 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 02:53:53,775 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:53:53,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:53:53,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287736441] [2024-11-14 02:53:53,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287736441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:53,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:53:53,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:53:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131074436] [2024-11-14 02:53:53,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:53,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 02:53:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:53:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 02:53:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:53:53,819 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 1.7938931297709924) internal successors, (235), 132 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:53,847 INFO L93 Difference]: Finished difference Result 196 states and 339 transitions. [2024-11-14 02:53:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 02:53:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 02:53:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:53,858 INFO L225 Difference]: With dead ends: 196 [2024-11-14 02:53:53,859 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 02:53:53,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:53:53,864 INFO L432 NwaCegarLoop]: 228 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:53,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:53:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 02:53:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-14 02:53:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.78125) internal successors, (228), 128 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 228 transitions. [2024-11-14 02:53:53,910 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 228 transitions. Word has length 29 [2024-11-14 02:53:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:53,910 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 228 transitions. [2024-11-14 02:53:53,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 228 transitions. [2024-11-14 02:53:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 02:53:53,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:53,912 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] [2024-11-14 02:53:53,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 02:53:54,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:54,113 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:54,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:54,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2077117649, now seen corresponding path program 1 times [2024-11-14 02:53:54,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:53:54,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646366365] [2024-11-14 02:53:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:53:54,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:53:54,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 02:53:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:54,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:53:54,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:54,406 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 02:53:54,406 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:53:54,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:53:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646366365] [2024-11-14 02:53:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646366365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:54,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:53:54,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:53:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020416594] [2024-11-14 02:53:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:54,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:53:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:53:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:53:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:53:54,411 INFO L87 Difference]: Start difference. First operand 129 states and 228 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:54,646 INFO L93 Difference]: Finished difference Result 195 states and 332 transitions. [2024-11-14 02:53:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:53:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 02:53:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:54,649 INFO L225 Difference]: With dead ends: 195 [2024-11-14 02:53:54,652 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 02:53:54,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 02:53:54,654 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 0 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:54,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 838 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:53:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 02:53:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-14 02:53:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.3046875) internal successors, (167), 128 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2024-11-14 02:53:54,674 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 29 [2024-11-14 02:53:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:54,675 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2024-11-14 02:53:54,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2024-11-14 02:53:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 02:53:54,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:54,679 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, 1, 1, 1, 1, 1, 1, 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 02:53:54,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-14 02:53:54,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:54,885 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:54,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 738687263, now seen corresponding path program 1 times [2024-11-14 02:53:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:53:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782797589] [2024-11-14 02:53:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:54,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:53:54,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:53:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 02:53:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:55,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:53:55,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:58,937 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 02:53:58,937 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:53:58,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:53:58,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782797589] [2024-11-14 02:53:58,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782797589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:58,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:53:58,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 02:53:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675861901] [2024-11-14 02:53:58,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:58,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:53:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:53:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:53:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:53:58,941 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:59,622 INFO L93 Difference]: Finished difference Result 687 states and 1067 transitions. [2024-11-14 02:53:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:53:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-14 02:53:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:59,631 INFO L225 Difference]: With dead ends: 687 [2024-11-14 02:53:59,631 INFO L226 Difference]: Without dead ends: 625 [2024-11-14 02:53:59,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:53:59,634 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 1143 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:59,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 1016 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:53:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-11-14 02:53:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 249. [2024-11-14 02:53:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 248 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 362 transitions. [2024-11-14 02:53:59,688 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 362 transitions. Word has length 89 [2024-11-14 02:53:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:59,689 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 362 transitions. [2024-11-14 02:53:59,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 362 transitions. [2024-11-14 02:53:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 02:53:59,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:59,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:59,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 02:53:59,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:59,897 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:59,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash -206832529, now seen corresponding path program 1 times [2024-11-14 02:53:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:53:59,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155399799] [2024-11-14 02:53:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:59,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:53:59,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:53:59,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:53:59,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 02:54:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:00,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:00,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:00,362 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 02:54:00,362 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:00,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:00,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155399799] [2024-11-14 02:54:00,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155399799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:00,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724166805] [2024-11-14 02:54:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:00,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:00,365 INFO L87 Difference]: Start difference. First operand 249 states and 362 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:00,426 INFO L93 Difference]: Finished difference Result 597 states and 924 transitions. [2024-11-14 02:54:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:00,427 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-14 02:54:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:00,429 INFO L225 Difference]: With dead ends: 597 [2024-11-14 02:54:00,429 INFO L226 Difference]: Without dead ends: 415 [2024-11-14 02:54:00,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 02:54:00,435 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:00,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 256 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-14 02:54:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 410. [2024-11-14 02:54:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.5085574572127138) internal successors, (617), 409 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 617 transitions. [2024-11-14 02:54:00,474 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 617 transitions. Word has length 91 [2024-11-14 02:54:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:00,475 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 617 transitions. [2024-11-14 02:54:00,475 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 617 transitions. [2024-11-14 02:54:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 02:54:00,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:00,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:00,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 02:54:00,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:00,681 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:00,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -470265049, now seen corresponding path program 1 times [2024-11-14 02:54:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:00,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570169471] [2024-11-14 02:54:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:00,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:00,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:00,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:00,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 02:54:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:00,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:54:00,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:00,944 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 02:54:00,944 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:00,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570169471] [2024-11-14 02:54:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570169471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:00,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:00,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:54:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613027921] [2024-11-14 02:54:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:00,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:54:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:54:00,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:54:00,946 INFO L87 Difference]: Start difference. First operand 410 states and 617 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:01,018 INFO L93 Difference]: Finished difference Result 424 states and 634 transitions. [2024-11-14 02:54:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:54:01,020 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2024-11-14 02:54:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:01,022 INFO L225 Difference]: With dead ends: 424 [2024-11-14 02:54:01,022 INFO L226 Difference]: Without dead ends: 422 [2024-11-14 02:54:01,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 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 02:54:01,024 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 0 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:01,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 647 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:54:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-11-14 02:54:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2024-11-14 02:54:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.491686460807601) internal successors, (628), 421 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 628 transitions. [2024-11-14 02:54:01,042 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 628 transitions. Word has length 92 [2024-11-14 02:54:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:01,043 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 628 transitions. [2024-11-14 02:54:01,043 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 628 transitions. [2024-11-14 02:54:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:01,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:01,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:01,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 02:54:01,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:01,248 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:01,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash 870115479, now seen corresponding path program 1 times [2024-11-14 02:54:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:01,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747683291] [2024-11-14 02:54:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:01,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:01,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:01,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:01,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-14 02:54:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:01,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:01,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:01,653 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 02:54:01,653 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:01,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747683291] [2024-11-14 02:54:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747683291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:01,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:01,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:01,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028347607] [2024-11-14 02:54:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:01,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:01,655 INFO L87 Difference]: Start difference. First operand 422 states and 628 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:01,697 INFO L93 Difference]: Finished difference Result 1108 states and 1708 transitions. [2024-11-14 02:54:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:01,702 INFO L225 Difference]: With dead ends: 1108 [2024-11-14 02:54:01,702 INFO L226 Difference]: Without dead ends: 753 [2024-11-14 02:54:01,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:01,705 INFO L432 NwaCegarLoop]: 244 mSDtfsCounter, 88 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:01,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 349 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-11-14 02:54:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 751. [2024-11-14 02:54:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.52) internal successors, (1140), 750 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1140 transitions. [2024-11-14 02:54:01,756 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1140 transitions. Word has length 93 [2024-11-14 02:54:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:01,756 INFO L471 AbstractCegarLoop]: Abstraction has 751 states and 1140 transitions. [2024-11-14 02:54:01,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1140 transitions. [2024-11-14 02:54:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:01,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:01,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:01,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-14 02:54:01,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:01,959 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:01,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1482782313, now seen corresponding path program 1 times [2024-11-14 02:54:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444548376] [2024-11-14 02:54:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:01,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:01,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:01,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-14 02:54:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:02,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:02,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:02,353 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 02:54:02,353 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:02,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:02,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444548376] [2024-11-14 02:54:02,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444548376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:02,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:02,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464814212] [2024-11-14 02:54:02,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:02,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:02,355 INFO L87 Difference]: Start difference. First operand 751 states and 1140 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:02,401 INFO L93 Difference]: Finished difference Result 2071 states and 3202 transitions. [2024-11-14 02:54:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:02,409 INFO L225 Difference]: With dead ends: 2071 [2024-11-14 02:54:02,409 INFO L226 Difference]: Without dead ends: 1387 [2024-11-14 02:54:02,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:02,413 INFO L432 NwaCegarLoop]: 242 mSDtfsCounter, 86 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:02,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 351 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2024-11-14 02:54:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1385. [2024-11-14 02:54:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 1.5289017341040463) internal successors, (2116), 1384 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2116 transitions. [2024-11-14 02:54:02,479 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2116 transitions. Word has length 93 [2024-11-14 02:54:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:02,480 INFO L471 AbstractCegarLoop]: Abstraction has 1385 states and 2116 transitions. [2024-11-14 02:54:02,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2116 transitions. [2024-11-14 02:54:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:02,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:02,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:02,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:02,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:02,686 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:02,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1319867753, now seen corresponding path program 1 times [2024-11-14 02:54:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:02,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184783241] [2024-11-14 02:54:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:02,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:02,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-14 02:54:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:02,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:02,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:03,034 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 02:54:03,034 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:03,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184783241] [2024-11-14 02:54:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184783241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:03,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:03,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820042963] [2024-11-14 02:54:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:03,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:03,041 INFO L87 Difference]: Start difference. First operand 1385 states and 2116 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:03,116 INFO L93 Difference]: Finished difference Result 3925 states and 6046 transitions. [2024-11-14 02:54:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:03,128 INFO L225 Difference]: With dead ends: 3925 [2024-11-14 02:54:03,128 INFO L226 Difference]: Without dead ends: 2607 [2024-11-14 02:54:03,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:03,133 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 84 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:03,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 353 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2024-11-14 02:54:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2605. [2024-11-14 02:54:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 1.5253456221198156) internal successors, (3972), 2604 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 3972 transitions. [2024-11-14 02:54:03,265 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 3972 transitions. Word has length 93 [2024-11-14 02:54:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:03,266 INFO L471 AbstractCegarLoop]: Abstraction has 2605 states and 3972 transitions. [2024-11-14 02:54:03,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 3972 transitions. [2024-11-14 02:54:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:03,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:03,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:03,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-11-14 02:54:03,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:03,468 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:03,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1056011369, now seen corresponding path program 1 times [2024-11-14 02:54:03,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:03,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688468015] [2024-11-14 02:54:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:03,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:03,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:03,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-14 02:54:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:03,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:03,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:03,823 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 02:54:03,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:03,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:03,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688468015] [2024-11-14 02:54:03,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688468015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:03,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:03,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773910544] [2024-11-14 02:54:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:03,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:03,826 INFO L87 Difference]: Start difference. First operand 2605 states and 3972 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:03,933 INFO L93 Difference]: Finished difference Result 7489 states and 11446 transitions. [2024-11-14 02:54:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:03,955 INFO L225 Difference]: With dead ends: 7489 [2024-11-14 02:54:03,956 INFO L226 Difference]: Without dead ends: 4951 [2024-11-14 02:54:03,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:03,960 INFO L432 NwaCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:03,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 355 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2024-11-14 02:54:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4949. [2024-11-14 02:54:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 1.5141471301535974) internal successors, (7492), 4948 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 7492 transitions. [2024-11-14 02:54:04,158 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 7492 transitions. Word has length 93 [2024-11-14 02:54:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:04,159 INFO L471 AbstractCegarLoop]: Abstraction has 4949 states and 7492 transitions. [2024-11-14 02:54:04,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 7492 transitions. [2024-11-14 02:54:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:04,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:04,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:04,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-14 02:54:04,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:04,364 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:04,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2033218153, now seen corresponding path program 1 times [2024-11-14 02:54:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:04,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904720467] [2024-11-14 02:54:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:04,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:04,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-11-14 02:54:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:04,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:04,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:04,683 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 02:54:04,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:04,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904720467] [2024-11-14 02:54:04,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904720467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:04,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:04,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913800567] [2024-11-14 02:54:04,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:04,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:04,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:04,685 INFO L87 Difference]: Start difference. First operand 4949 states and 7492 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:04,835 INFO L93 Difference]: Finished difference Result 14329 states and 21670 transitions. [2024-11-14 02:54:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:04,870 INFO L225 Difference]: With dead ends: 14329 [2024-11-14 02:54:04,870 INFO L226 Difference]: Without dead ends: 9447 [2024-11-14 02:54:04,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:04,877 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 78 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:04,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 351 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2024-11-14 02:54:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 9445. [2024-11-14 02:54:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 1.4980940279542567) internal successors, (14148), 9444 states have internal predecessors, (14148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 14148 transitions. [2024-11-14 02:54:05,184 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 14148 transitions. Word has length 93 [2024-11-14 02:54:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:05,184 INFO L471 AbstractCegarLoop]: Abstraction has 9445 states and 14148 transitions. [2024-11-14 02:54:05,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 14148 transitions. [2024-11-14 02:54:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:05,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:05,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:05,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-11-14 02:54:05,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:05,389 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:05,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash -252285289, now seen corresponding path program 1 times [2024-11-14 02:54:05,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:05,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619940974] [2024-11-14 02:54:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:05,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:05,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:05,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-14 02:54:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:05,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:05,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:05,736 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 02:54:05,736 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:05,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:05,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619940974] [2024-11-14 02:54:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619940974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:05,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162207046] [2024-11-14 02:54:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:05,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:05,739 INFO L87 Difference]: Start difference. First operand 9445 states and 14148 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:06,045 INFO L93 Difference]: Finished difference Result 27433 states and 40966 transitions. [2024-11-14 02:54:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:06,120 INFO L225 Difference]: With dead ends: 27433 [2024-11-14 02:54:06,120 INFO L226 Difference]: Without dead ends: 18055 [2024-11-14 02:54:06,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:06,134 INFO L432 NwaCegarLoop]: 224 mSDtfsCounter, 76 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:06,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 353 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18055 states. [2024-11-14 02:54:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18055 to 18053. [2024-11-14 02:54:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18053 states, 18052 states have (on average 1.4786173277199202) internal successors, (26692), 18052 states have internal predecessors, (26692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18053 states to 18053 states and 26692 transitions. [2024-11-14 02:54:06,807 INFO L78 Accepts]: Start accepts. Automaton has 18053 states and 26692 transitions. Word has length 93 [2024-11-14 02:54:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:06,808 INFO L471 AbstractCegarLoop]: Abstraction has 18053 states and 26692 transitions. [2024-11-14 02:54:06,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 18053 states and 26692 transitions. [2024-11-14 02:54:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 02:54:06,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:06,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:06,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:07,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:07,014 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:07,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash 182250647, now seen corresponding path program 1 times [2024-11-14 02:54:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744753224] [2024-11-14 02:54:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:07,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:07,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:07,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-14 02:54:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:07,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:07,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:07,325 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 02:54:07,325 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:07,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:07,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744753224] [2024-11-14 02:54:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744753224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:07,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:07,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342575448] [2024-11-14 02:54:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:07,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:07,328 INFO L87 Difference]: Start difference. First operand 18053 states and 26692 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:07,818 INFO L93 Difference]: Finished difference Result 52489 states and 77254 transitions. [2024-11-14 02:54:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 02:54:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:07,903 INFO L225 Difference]: With dead ends: 52489 [2024-11-14 02:54:07,903 INFO L226 Difference]: Without dead ends: 34503 [2024-11-14 02:54:07,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:54:07,927 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 80 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:07,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 357 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34503 states. [2024-11-14 02:54:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34503 to 34501. [2024-11-14 02:54:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34501 states, 34500 states have (on average 1.4563478260869565) internal successors, (50244), 34500 states have internal predecessors, (50244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34501 states to 34501 states and 50244 transitions. [2024-11-14 02:54:09,175 INFO L78 Accepts]: Start accepts. Automaton has 34501 states and 50244 transitions. Word has length 93 [2024-11-14 02:54:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:09,175 INFO L471 AbstractCegarLoop]: Abstraction has 34501 states and 50244 transitions. [2024-11-14 02:54:09,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 34501 states and 50244 transitions. [2024-11-14 02:54:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 02:54:09,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:09,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:54:09,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-11-14 02:54:09,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:09,379 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:09,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1152420626, now seen corresponding path program 1 times [2024-11-14 02:54:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095090253] [2024-11-14 02:54:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:09,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:09,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:09,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-11-14 02:54:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:09,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:09,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:09,705 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 02:54:09,705 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:09,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:09,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095090253] [2024-11-14 02:54:09,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095090253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:09,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:09,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887661854] [2024-11-14 02:54:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:09,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:09,706 INFO L87 Difference]: Start difference. First operand 34501 states and 50244 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:10,555 INFO L93 Difference]: Finished difference Result 69836 states and 102474 transitions. [2024-11-14 02:54:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:10,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-14 02:54:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:10,661 INFO L225 Difference]: With dead ends: 69836 [2024-11-14 02:54:10,661 INFO L226 Difference]: Without dead ends: 51017 [2024-11-14 02:54:10,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 02:54:10,677 INFO L432 NwaCegarLoop]: 249 mSDtfsCounter, 87 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:10,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 350 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51017 states. [2024-11-14 02:54:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51017 to 51015. [2024-11-14 02:54:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51015 states, 51014 states have (on average 1.4516407260751951) internal successors, (74054), 51014 states have internal predecessors, (74054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51015 states to 51015 states and 74054 transitions. [2024-11-14 02:54:12,103 INFO L78 Accepts]: Start accepts. Automaton has 51015 states and 74054 transitions. Word has length 95 [2024-11-14 02:54:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:12,104 INFO L471 AbstractCegarLoop]: Abstraction has 51015 states and 74054 transitions. [2024-11-14 02:54:12,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 51015 states and 74054 transitions. [2024-11-14 02:54:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-14 02:54:12,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:12,113 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:12,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-11-14 02:54:12,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:12,315 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:12,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1510851326, now seen corresponding path program 1 times [2024-11-14 02:54:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813650529] [2024-11-14 02:54:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:12,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:12,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:12,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:12,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-14 02:54:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:12,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:12,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:12,635 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:12,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813650529] [2024-11-14 02:54:12,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813650529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:12,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:54:12,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:54:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748904137] [2024-11-14 02:54:12,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:12,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:54:12,637 INFO L87 Difference]: Start difference. First operand 51015 states and 74054 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:13,414 INFO L93 Difference]: Finished difference Result 86373 states and 125923 transitions. [2024-11-14 02:54:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2024-11-14 02:54:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:13,481 INFO L225 Difference]: With dead ends: 86373 [2024-11-14 02:54:13,481 INFO L226 Difference]: Without dead ends: 35427 [2024-11-14 02:54:13,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 02:54:13,507 INFO L432 NwaCegarLoop]: 231 mSDtfsCounter, 74 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:13,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 383 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35427 states. [2024-11-14 02:54:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35427 to 35425. [2024-11-14 02:54:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35425 states, 35424 states have (on average 1.4552845528455285) internal successors, (51552), 35424 states have internal predecessors, (51552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35425 states to 35425 states and 51552 transitions. [2024-11-14 02:54:14,469 INFO L78 Accepts]: Start accepts. Automaton has 35425 states and 51552 transitions. Word has length 118 [2024-11-14 02:54:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:14,469 INFO L471 AbstractCegarLoop]: Abstraction has 35425 states and 51552 transitions. [2024-11-14 02:54:14,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 35425 states and 51552 transitions. [2024-11-14 02:54:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 02:54:14,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:14,476 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:14,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:14,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:14,677 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1575721031, now seen corresponding path program 1 times [2024-11-14 02:54:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481308440] [2024-11-14 02:54:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:14,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:14,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:14,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:14,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-14 02:54:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:14,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:54:14,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:16,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:17,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481308440] [2024-11-14 02:54:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481308440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [725782154] [2024-11-14 02:54:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:17,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:17,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:17,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-14 02:54:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:17,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:17,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:17,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [725782154] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:17,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:17,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8, 4] total 19 [2024-11-14 02:54:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372625651] [2024-11-14 02:54:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:17,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:17,988 INFO L87 Difference]: Start difference. First operand 35425 states and 51552 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:18,179 INFO L93 Difference]: Finished difference Result 53093 states and 77282 transitions. [2024-11-14 02:54:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:18,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2024-11-14 02:54:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:18,206 INFO L225 Difference]: With dead ends: 53093 [2024-11-14 02:54:18,206 INFO L226 Difference]: Without dead ends: 17763 [2024-11-14 02:54:18,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:18,227 INFO L432 NwaCegarLoop]: 224 mSDtfsCounter, 67 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:18,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 368 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17763 states. [2024-11-14 02:54:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17763 to 17761. [2024-11-14 02:54:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17761 states, 17760 states have (on average 1.4432432432432432) internal successors, (25632), 17760 states have internal predecessors, (25632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17761 states to 17761 states and 25632 transitions. [2024-11-14 02:54:18,831 INFO L78 Accepts]: Start accepts. Automaton has 17761 states and 25632 transitions. Word has length 120 [2024-11-14 02:54:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:18,832 INFO L471 AbstractCegarLoop]: Abstraction has 17761 states and 25632 transitions. [2024-11-14 02:54:18,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17761 states and 25632 transitions. [2024-11-14 02:54:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 02:54:18,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:18,837 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-11-14 02:54:18,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-11-14 02:54:19,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-14 02:54:19,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:19,238 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:19,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1089863897, now seen corresponding path program 1 times [2024-11-14 02:54:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:19,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132465362] [2024-11-14 02:54:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:19,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:19,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:19,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:19,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-14 02:54:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:19,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:19,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:20,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:21,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:21,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132465362] [2024-11-14 02:54:21,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132465362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:21,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [858149367] [2024-11-14 02:54:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:21,908 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:21,910 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:21,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-14 02:54:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:22,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:22,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:22,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:22,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [858149367] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:22,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:22,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713332984] [2024-11-14 02:54:22,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:22,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:22,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:22,866 INFO L87 Difference]: Start difference. First operand 17761 states and 25632 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:23,143 INFO L93 Difference]: Finished difference Result 26597 states and 38402 transitions. [2024-11-14 02:54:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-11-14 02:54:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:23,159 INFO L225 Difference]: With dead ends: 26597 [2024-11-14 02:54:23,159 INFO L226 Difference]: Without dead ends: 8931 [2024-11-14 02:54:23,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:23,172 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 64 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:23,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 353 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8931 states. [2024-11-14 02:54:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8931 to 8929. [2024-11-14 02:54:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8929 states, 8928 states have (on average 1.4301075268817205) internal successors, (12768), 8928 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8929 states to 8929 states and 12768 transitions. [2024-11-14 02:54:23,460 INFO L78 Accepts]: Start accepts. Automaton has 8929 states and 12768 transitions. Word has length 122 [2024-11-14 02:54:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:23,460 INFO L471 AbstractCegarLoop]: Abstraction has 8929 states and 12768 transitions. [2024-11-14 02:54:23,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8929 states and 12768 transitions. [2024-11-14 02:54:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 02:54:23,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:23,465 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:54:23,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-14 02:54:23,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-11-14 02:54:23,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:23,866 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:23,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash 691230741, now seen corresponding path program 1 times [2024-11-14 02:54:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654841715] [2024-11-14 02:54:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:23,870 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:23,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-11-14 02:54:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:24,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:24,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:25,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:26,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654841715] [2024-11-14 02:54:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654841715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421135587] [2024-11-14 02:54:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:26,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:26,072 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:26,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-14 02:54:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:26,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:26,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:26,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421135587] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929082595] [2024-11-14 02:54:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:26,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:26,829 INFO L87 Difference]: Start difference. First operand 8929 states and 12768 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:26,949 INFO L93 Difference]: Finished difference Result 13349 states and 19106 transitions. [2024-11-14 02:54:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-11-14 02:54:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:26,956 INFO L225 Difference]: With dead ends: 13349 [2024-11-14 02:54:26,956 INFO L226 Difference]: Without dead ends: 4515 [2024-11-14 02:54:26,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:26,961 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 61 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:26,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 338 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2024-11-14 02:54:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4513. [2024-11-14 02:54:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 1.4148936170212767) internal successors, (6384), 4512 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 6384 transitions. [2024-11-14 02:54:27,102 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 6384 transitions. Word has length 124 [2024-11-14 02:54:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:27,103 INFO L471 AbstractCegarLoop]: Abstraction has 4513 states and 6384 transitions. [2024-11-14 02:54:27,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 6384 transitions. [2024-11-14 02:54:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-14 02:54:27,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:27,105 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:27,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-14 02:54:27,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-11-14 02:54:27,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:27,506 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:27,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1705291133, now seen corresponding path program 1 times [2024-11-14 02:54:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153043050] [2024-11-14 02:54:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:27,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:27,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:27,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:27,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-11-14 02:54:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:27,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:27,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:28,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:29,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153043050] [2024-11-14 02:54:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153043050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100079469] [2024-11-14 02:54:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:29,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:29,491 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:29,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-14 02:54:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:29,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:29,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:30,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100079469] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:30,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604338083] [2024-11-14 02:54:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:30,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:30,235 INFO L87 Difference]: Start difference. First operand 4513 states and 6384 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:30,286 INFO L93 Difference]: Finished difference Result 6725 states and 9530 transitions. [2024-11-14 02:54:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-11-14 02:54:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:30,290 INFO L225 Difference]: With dead ends: 6725 [2024-11-14 02:54:30,291 INFO L226 Difference]: Without dead ends: 2307 [2024-11-14 02:54:30,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:30,293 INFO L432 NwaCegarLoop]: 203 mSDtfsCounter, 58 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:30,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 323 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2024-11-14 02:54:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2305. [2024-11-14 02:54:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.3958333333333333) internal successors, (3216), 2304 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3216 transitions. [2024-11-14 02:54:30,346 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3216 transitions. Word has length 126 [2024-11-14 02:54:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:30,347 INFO L471 AbstractCegarLoop]: Abstraction has 2305 states and 3216 transitions. [2024-11-14 02:54:30,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3216 transitions. [2024-11-14 02:54:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 02:54:30,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:30,350 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:30,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2024-11-14 02:54:30,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-14 02:54:30,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:30,751 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:30,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1902431857, now seen corresponding path program 1 times [2024-11-14 02:54:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650618825] [2024-11-14 02:54:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:30,754 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:30,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-11-14 02:54:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:30,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:30,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:32,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:32,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650618825] [2024-11-14 02:54:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650618825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44200303] [2024-11-14 02:54:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:32,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:32,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:32,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-14 02:54:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:33,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:33,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:33,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:33,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44200303] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:33,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:33,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031073699] [2024-11-14 02:54:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:33,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:33,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:33,605 INFO L87 Difference]: Start difference. First operand 2305 states and 3216 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:33,654 INFO L93 Difference]: Finished difference Result 3413 states and 4778 transitions. [2024-11-14 02:54:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-14 02:54:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:33,659 INFO L225 Difference]: With dead ends: 3413 [2024-11-14 02:54:33,659 INFO L226 Difference]: Without dead ends: 1203 [2024-11-14 02:54:33,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:33,661 INFO L432 NwaCegarLoop]: 196 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:33,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 308 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2024-11-14 02:54:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1201. [2024-11-14 02:54:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 1.37) internal successors, (1644), 1200 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1644 transitions. [2024-11-14 02:54:33,707 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1644 transitions. Word has length 128 [2024-11-14 02:54:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:33,710 INFO L471 AbstractCegarLoop]: Abstraction has 1201 states and 1644 transitions. [2024-11-14 02:54:33,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1644 transitions. [2024-11-14 02:54:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 02:54:33,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:33,712 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:33,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2024-11-14 02:54:33,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:34,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:34,113 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:34,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1605719073, now seen corresponding path program 1 times [2024-11-14 02:54:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373713819] [2024-11-14 02:54:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:34,116 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:34,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2024-11-14 02:54:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:34,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:34,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:35,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:35,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:35,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373713819] [2024-11-14 02:54:35,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373713819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:35,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436792666] [2024-11-14 02:54:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:35,939 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:35,941 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:35,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-14 02:54:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:36,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:36,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:36,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:36,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436792666] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:36,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:36,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:36,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129886900] [2024-11-14 02:54:36,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:36,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:36,766 INFO L87 Difference]: Start difference. First operand 1201 states and 1644 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:36,793 INFO L93 Difference]: Finished difference Result 1757 states and 2420 transitions. [2024-11-14 02:54:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-14 02:54:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:36,796 INFO L225 Difference]: With dead ends: 1757 [2024-11-14 02:54:36,796 INFO L226 Difference]: Without dead ends: 651 [2024-11-14 02:54:36,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:36,797 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 52 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:36,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 293 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-11-14 02:54:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2024-11-14 02:54:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.3333333333333333) internal successors, (864), 648 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 864 transitions. [2024-11-14 02:54:36,817 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 864 transitions. Word has length 130 [2024-11-14 02:54:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:36,818 INFO L471 AbstractCegarLoop]: Abstraction has 649 states and 864 transitions. [2024-11-14 02:54:36,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 864 transitions. [2024-11-14 02:54:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 02:54:36,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:36,819 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:36,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:37,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-14 02:54:37,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:37,220 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:37,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash 147290061, now seen corresponding path program 1 times [2024-11-14 02:54:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:37,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964139794] [2024-11-14 02:54:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:37,222 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:37,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2024-11-14 02:54:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:37,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:37,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:38,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:39,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:39,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964139794] [2024-11-14 02:54:39,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964139794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:39,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [562976561] [2024-11-14 02:54:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:39,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:39,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:39,179 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:39,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-14 02:54:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:39,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:54:39,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:39,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [562976561] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:40,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 02:54:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562773700] [2024-11-14 02:54:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:40,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:40,079 INFO L87 Difference]: Start difference. First operand 649 states and 864 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:40,102 INFO L93 Difference]: Finished difference Result 929 states and 1250 transitions. [2024-11-14 02:54:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2024-11-14 02:54:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:40,105 INFO L225 Difference]: With dead ends: 929 [2024-11-14 02:54:40,105 INFO L226 Difference]: Without dead ends: 375 [2024-11-14 02:54:40,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:40,106 INFO L432 NwaCegarLoop]: 182 mSDtfsCounter, 49 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:40,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 278 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:54:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-14 02:54:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2024-11-14 02:54:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.282258064516129) internal successors, (477), 372 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 477 transitions. [2024-11-14 02:54:40,117 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 477 transitions. Word has length 132 [2024-11-14 02:54:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:40,117 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 477 transitions. [2024-11-14 02:54:40,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 477 transitions. [2024-11-14 02:54:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:54:40,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:40,118 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:40,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2024-11-14 02:54:40,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-14 02:54:40,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:40,519 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:40,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2094111429, now seen corresponding path program 1 times [2024-11-14 02:54:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848256952] [2024-11-14 02:54:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:40,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:40,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:40,522 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:40,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2024-11-14 02:54:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:40,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:40,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:41,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:42,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848256952] [2024-11-14 02:54:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848256952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [873819953] [2024-11-14 02:54:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:42,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:42,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-14 02:54:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:42,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:54:42,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:54:45,619 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:45,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [873819953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:45,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:54:45,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:54:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262293439] [2024-11-14 02:54:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:45,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:54:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:54:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:45,621 INFO L87 Difference]: Start difference. First operand 373 states and 477 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:46,057 INFO L93 Difference]: Finished difference Result 1219 states and 1641 transitions. [2024-11-14 02:54:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:54:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:54:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:46,064 INFO L225 Difference]: With dead ends: 1219 [2024-11-14 02:54:46,064 INFO L226 Difference]: Without dead ends: 1125 [2024-11-14 02:54:46,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:46,068 INFO L432 NwaCegarLoop]: 258 mSDtfsCounter, 803 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:46,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1236 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:54:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-11-14 02:54:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 557. [2024-11-14 02:54:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.3003597122302157) internal successors, (723), 556 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 723 transitions. [2024-11-14 02:54:46,087 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 723 transitions. Word has length 134 [2024-11-14 02:54:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:46,088 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 723 transitions. [2024-11-14 02:54:46,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 723 transitions. [2024-11-14 02:54:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:54:46,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:46,090 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:46,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2024-11-14 02:54:46,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2024-11-14 02:54:46,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:46,491 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:46,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1055978693, now seen corresponding path program 1 times [2024-11-14 02:54:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:46,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034286066] [2024-11-14 02:54:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:46,494 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:46,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2024-11-14 02:54:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:46,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:46,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:47,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:48,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:48,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034286066] [2024-11-14 02:54:48,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034286066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:48,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1294534805] [2024-11-14 02:54:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:48,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:48,153 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:48,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-14 02:54:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:48,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:54:48,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 02:54:51,274 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1294534805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:54:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:54:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481768926] [2024-11-14 02:54:51,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:51,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:54:51,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:54:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:51,275 INFO L87 Difference]: Start difference. First operand 557 states and 723 transitions. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:51,684 INFO L93 Difference]: Finished difference Result 1311 states and 1764 transitions. [2024-11-14 02:54:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:54:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:54:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:51,687 INFO L225 Difference]: With dead ends: 1311 [2024-11-14 02:54:51,687 INFO L226 Difference]: Without dead ends: 1033 [2024-11-14 02:54:51,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:51,689 INFO L432 NwaCegarLoop]: 258 mSDtfsCounter, 1270 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:51,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 1100 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:54:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2024-11-14 02:54:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 465. [2024-11-14 02:54:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.2801724137931034) internal successors, (594), 464 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 594 transitions. [2024-11-14 02:54:51,705 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 594 transitions. Word has length 134 [2024-11-14 02:54:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:51,705 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 594 transitions. [2024-11-14 02:54:51,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 594 transitions. [2024-11-14 02:54:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:54:51,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:51,707 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:51,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-14 02:54:51,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2024-11-14 02:54:52,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:52,107 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:52,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1614940101, now seen corresponding path program 1 times [2024-11-14 02:54:52,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:52,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630837245] [2024-11-14 02:54:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:52,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:52,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:52,111 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:52,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2024-11-14 02:54:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:52,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:52,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:53,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:53,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630837245] [2024-11-14 02:54:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630837245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020461456] [2024-11-14 02:54:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:53,627 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:53,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:53,628 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:53,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-14 02:54:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:54,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:54:54,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:54:56,682 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:56,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1020461456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:56,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:54:56,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:54:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832332900] [2024-11-14 02:54:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:56,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:54:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:54:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:54:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:56,684 INFO L87 Difference]: Start difference. First operand 465 states and 594 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:57,097 INFO L93 Difference]: Finished difference Result 1219 states and 1635 transitions. [2024-11-14 02:54:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:54:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:54:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:57,100 INFO L225 Difference]: With dead ends: 1219 [2024-11-14 02:54:57,101 INFO L226 Difference]: Without dead ends: 1125 [2024-11-14 02:54:57,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:57,102 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 1035 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:57,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1086 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:54:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-11-14 02:54:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 557. [2024-11-14 02:54:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.289568345323741) internal successors, (717), 556 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 717 transitions. [2024-11-14 02:54:57,119 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 717 transitions. Word has length 134 [2024-11-14 02:54:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:57,119 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 717 transitions. [2024-11-14 02:54:57,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 717 transitions. [2024-11-14 02:54:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:54:57,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:57,121 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:54:57,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2024-11-14 02:54:57,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:57,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:57,522 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:57,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 782258747, now seen corresponding path program 1 times [2024-11-14 02:54:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:54:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090492606] [2024-11-14 02:54:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:57,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:54:57,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:54:57,524 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:54:57,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2024-11-14 02:54:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:57,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:54:57,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:58,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:58,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:54:58,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090492606] [2024-11-14 02:54:58,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090492606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:58,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892904438] [2024-11-14 02:54:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:58,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:54:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:54:58,983 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:54:58,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2024-11-14 02:54:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:59,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:54:59,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:55:02,107 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:55:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892904438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:55:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909981809] [2024-11-14 02:55:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:02,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:55:02,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:55:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:02,109 INFO L87 Difference]: Start difference. First operand 557 states and 717 transitions. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:02,551 INFO L93 Difference]: Finished difference Result 1311 states and 1758 transitions. [2024-11-14 02:55:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:55:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:55:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:02,554 INFO L225 Difference]: With dead ends: 1311 [2024-11-14 02:55:02,555 INFO L226 Difference]: Without dead ends: 1217 [2024-11-14 02:55:02,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:02,556 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 864 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:02,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1195 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:55:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2024-11-14 02:55:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 649. [2024-11-14 02:55:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2962962962962963) internal successors, (840), 648 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 840 transitions. [2024-11-14 02:55:02,577 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 840 transitions. Word has length 134 [2024-11-14 02:55:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:02,578 INFO L471 AbstractCegarLoop]: Abstraction has 649 states and 840 transitions. [2024-11-14 02:55:02,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 840 transitions. [2024-11-14 02:55:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:55:02,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:02,579 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:02,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:02,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2024-11-14 02:55:02,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:02,980 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:02,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -984367301, now seen corresponding path program 1 times [2024-11-14 02:55:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228074595] [2024-11-14 02:55:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:02,982 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:02,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2024-11-14 02:55:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:03,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:03,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:03,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:04,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228074595] [2024-11-14 02:55:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228074595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96951550] [2024-11-14 02:55:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:04,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:04,488 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:04,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2024-11-14 02:55:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:04,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:04,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:55:07,501 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:55:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96951550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:07,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:07,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:55:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637874731] [2024-11-14 02:55:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:07,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:55:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:55:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:07,503 INFO L87 Difference]: Start difference. First operand 649 states and 840 transitions. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:07,840 INFO L93 Difference]: Finished difference Result 1403 states and 1881 transitions. [2024-11-14 02:55:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:55:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:55:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:07,843 INFO L225 Difference]: With dead ends: 1403 [2024-11-14 02:55:07,843 INFO L226 Difference]: Without dead ends: 1309 [2024-11-14 02:55:07,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:07,844 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 955 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:07,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 1273 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:55:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2024-11-14 02:55:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 741. [2024-11-14 02:55:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.3013513513513513) internal successors, (963), 740 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 963 transitions. [2024-11-14 02:55:07,868 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 963 transitions. Word has length 134 [2024-11-14 02:55:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:07,869 INFO L471 AbstractCegarLoop]: Abstraction has 741 states and 963 transitions. [2024-11-14 02:55:07,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 963 transitions. [2024-11-14 02:55:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:55:07,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:07,870 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:07,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:08,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2024-11-14 02:55:08,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:08,271 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:08,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -897012677, now seen corresponding path program 1 times [2024-11-14 02:55:08,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:08,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388575132] [2024-11-14 02:55:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:08,275 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:08,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2024-11-14 02:55:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:08,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:08,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:09,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:09,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:09,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388575132] [2024-11-14 02:55:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388575132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:09,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1484141938] [2024-11-14 02:55:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:09,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:09,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:09,735 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:09,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2024-11-14 02:55:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:10,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:10,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:55:12,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:55:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1484141938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:12,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:55:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764671297] [2024-11-14 02:55:12,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:12,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:55:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:55:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:12,971 INFO L87 Difference]: Start difference. First operand 741 states and 963 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:13,327 INFO L93 Difference]: Finished difference Result 1495 states and 2004 transitions. [2024-11-14 02:55:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:55:13,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:55:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:13,331 INFO L225 Difference]: With dead ends: 1495 [2024-11-14 02:55:13,331 INFO L226 Difference]: Without dead ends: 1401 [2024-11-14 02:55:13,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:13,332 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 988 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:13,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1130 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:55:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2024-11-14 02:55:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 833. [2024-11-14 02:55:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.3052884615384615) internal successors, (1086), 832 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1086 transitions. [2024-11-14 02:55:13,361 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1086 transitions. Word has length 134 [2024-11-14 02:55:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:13,362 INFO L471 AbstractCegarLoop]: Abstraction has 833 states and 1086 transitions. [2024-11-14 02:55:13,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1086 transitions. [2024-11-14 02:55:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:55:13,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:13,363 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:13,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2024-11-14 02:55:13,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2024-11-14 02:55:13,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:13,764 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:13,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash 561977659, now seen corresponding path program 1 times [2024-11-14 02:55:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782488062] [2024-11-14 02:55:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:13,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:13,766 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:13,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2024-11-14 02:55:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:13,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:13,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:14,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:15,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782488062] [2024-11-14 02:55:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782488062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62070860] [2024-11-14 02:55:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:15,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:15,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:15,209 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:15,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-14 02:55:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:15,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:15,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:55:18,256 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:55:18,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62070860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:18,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:18,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2024-11-14 02:55:18,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709017768] [2024-11-14 02:55:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:18,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:55:18,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:55:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:18,258 INFO L87 Difference]: Start difference. First operand 833 states and 1086 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:18,587 INFO L93 Difference]: Finished difference Result 1587 states and 2127 transitions. [2024-11-14 02:55:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:55:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:55:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:18,590 INFO L225 Difference]: With dead ends: 1587 [2024-11-14 02:55:18,590 INFO L226 Difference]: Without dead ends: 1493 [2024-11-14 02:55:18,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:18,591 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 1089 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:18,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 1165 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:55:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2024-11-14 02:55:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 925. [2024-11-14 02:55:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.3084415584415585) internal successors, (1209), 924 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1209 transitions. [2024-11-14 02:55:18,610 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1209 transitions. Word has length 134 [2024-11-14 02:55:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:18,610 INFO L471 AbstractCegarLoop]: Abstraction has 925 states and 1209 transitions. [2024-11-14 02:55:18,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1209 transitions. [2024-11-14 02:55:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 02:55:18,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:18,611 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:18,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2024-11-14 02:55:18,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2024-11-14 02:55:19,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:19,012 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:19,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash 225904187, now seen corresponding path program 1 times [2024-11-14 02:55:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:19,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646940653] [2024-11-14 02:55:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:19,017 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:19,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2024-11-14 02:55:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:19,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:19,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:20,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:20,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646940653] [2024-11-14 02:55:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646940653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929770921] [2024-11-14 02:55:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:20,590 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:20,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2024-11-14 02:55:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:21,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:21,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:55:23,744 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:55:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1929770921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:23,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 8] total 24 [2024-11-14 02:55:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041899380] [2024-11-14 02:55:23,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:23,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:55:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:55:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:23,745 INFO L87 Difference]: Start difference. First operand 925 states and 1209 transitions. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:24,037 INFO L93 Difference]: Finished difference Result 1679 states and 2250 transitions. [2024-11-14 02:55:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:55:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 02:55:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:24,040 INFO L225 Difference]: With dead ends: 1679 [2024-11-14 02:55:24,040 INFO L226 Difference]: Without dead ends: 1585 [2024-11-14 02:55:24,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:55:24,041 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 976 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:24,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1173 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:55:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2024-11-14 02:55:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1017. [2024-11-14 02:55:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.311023622047244) internal successors, (1332), 1016 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1332 transitions. [2024-11-14 02:55:24,067 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1332 transitions. Word has length 134 [2024-11-14 02:55:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:24,067 INFO L471 AbstractCegarLoop]: Abstraction has 1017 states and 1332 transitions. [2024-11-14 02:55:24,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1332 transitions. [2024-11-14 02:55:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 02:55:24,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:24,068 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:24,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2024-11-14 02:55:24,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2024-11-14 02:55:24,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:24,469 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:24,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash -675619564, now seen corresponding path program 1 times [2024-11-14 02:55:24,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:24,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671401816] [2024-11-14 02:55:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:24,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:24,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:24,471 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:24,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2024-11-14 02:55:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:24,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:24,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:25,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:25,867 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:25,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671401816] [2024-11-14 02:55:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671401816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293050592] [2024-11-14 02:55:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:25,869 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:25,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-14 02:55:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:26,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:55:26,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:55:26,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:55:26,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293050592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372727145] [2024-11-14 02:55:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:26,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:26,757 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:26,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 02:55:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:27,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:55:27,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:55:27,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:27,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372727145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:27,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:55:27,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 5] total 21 [2024-11-14 02:55:27,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474891933] [2024-11-14 02:55:27,526 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:27,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 02:55:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 02:55:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-14 02:55:27,528 INFO L87 Difference]: Start difference. First operand 1017 states and 1332 transitions. Second operand has 21 states, 21 states have (on average 27.238095238095237) internal successors, (572), 21 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:29,464 INFO L93 Difference]: Finished difference Result 4252 states and 5634 transitions. [2024-11-14 02:55:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 02:55:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 27.238095238095237) internal successors, (572), 21 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-14 02:55:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:29,470 INFO L225 Difference]: With dead ends: 4252 [2024-11-14 02:55:29,470 INFO L226 Difference]: Without dead ends: 3330 [2024-11-14 02:55:29,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 784 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1657, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 02:55:29,473 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 2262 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:29,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 1038 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:55:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2024-11-14 02:55:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3294. [2024-11-14 02:55:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 1.2860613422411176) internal successors, (4235), 3293 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 4235 transitions. [2024-11-14 02:55:29,617 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 4235 transitions. Word has length 135 [2024-11-14 02:55:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:29,617 INFO L471 AbstractCegarLoop]: Abstraction has 3294 states and 4235 transitions. [2024-11-14 02:55:29,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 27.238095238095237) internal successors, (572), 21 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 4235 transitions. [2024-11-14 02:55:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 02:55:29,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:29,619 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:29,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 02:55:29,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2024-11-14 02:55:30,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:30,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:30,220 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:30,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash 937369925, now seen corresponding path program 1 times [2024-11-14 02:55:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:30,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638185795] [2024-11-14 02:55:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:30,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:30,223 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:30,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2024-11-14 02:55:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:30,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:30,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:31,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:31,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638185795] [2024-11-14 02:55:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638185795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [763463343] [2024-11-14 02:55:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:31,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:31,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:31,625 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-14 02:55:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:32,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:32,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:33,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [763463343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699866384] [2024-11-14 02:55:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:33,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:33,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:33,374 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 02:55:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:33,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:55:33,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:34,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699866384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:35,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:55:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 8] total 37 [2024-11-14 02:55:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936415491] [2024-11-14 02:55:35,298 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:35,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:55:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:55:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:55:35,301 INFO L87 Difference]: Start difference. First operand 3294 states and 4235 transitions. Second operand has 37 states, 37 states have (on average 14.621621621621621) internal successors, (541), 37 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:38,258 INFO L93 Difference]: Finished difference Result 12343 states and 16086 transitions. [2024-11-14 02:55:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 02:55:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 14.621621621621621) internal successors, (541), 37 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-11-14 02:55:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:38,266 INFO L225 Difference]: With dead ends: 12343 [2024-11-14 02:55:38,266 INFO L226 Difference]: Without dead ends: 9236 [2024-11-14 02:55:38,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=725, Invalid=3307, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 02:55:38,269 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 2711 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:38,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2711 Valid, 1614 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:55:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2024-11-14 02:55:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 8386. [2024-11-14 02:55:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8386 states, 8385 states have (on average 1.272510435301133) internal successors, (10670), 8385 states have internal predecessors, (10670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8386 states to 8386 states and 10670 transitions. [2024-11-14 02:55:38,510 INFO L78 Accepts]: Start accepts. Automaton has 8386 states and 10670 transitions. Word has length 136 [2024-11-14 02:55:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:38,511 INFO L471 AbstractCegarLoop]: Abstraction has 8386 states and 10670 transitions. [2024-11-14 02:55:38,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 14.621621621621621) internal successors, (541), 37 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8386 states and 10670 transitions. [2024-11-14 02:55:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 02:55:38,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:38,512 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:38,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 02:55:38,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2024-11-14 02:55:38,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:39,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:39,113 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:39,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1660796538, now seen corresponding path program 1 times [2024-11-14 02:55:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:39,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041366213] [2024-11-14 02:55:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:39,116 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:39,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2024-11-14 02:55:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:39,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:39,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:40,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:40,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041366213] [2024-11-14 02:55:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041366213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086617857] [2024-11-14 02:55:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:40,814 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:40,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-14 02:55:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:41,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:41,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:42,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086617857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770144173] [2024-11-14 02:55:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:42,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:42,660 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:42,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 02:55:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:42,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:55:42,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:44,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770144173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:44,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:55:44,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2024-11-14 02:55:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549136055] [2024-11-14 02:55:44,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:44,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:55:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:55:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:55:44,652 INFO L87 Difference]: Start difference. First operand 8386 states and 10670 transitions. Second operand has 37 states, 37 states have (on average 15.72972972972973) internal successors, (582), 37 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:46,896 INFO L93 Difference]: Finished difference Result 16377 states and 20867 transitions. [2024-11-14 02:55:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 02:55:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 15.72972972972973) internal successors, (582), 37 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2024-11-14 02:55:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:46,904 INFO L225 Difference]: With dead ends: 16377 [2024-11-14 02:55:46,904 INFO L226 Difference]: Without dead ends: 8248 [2024-11-14 02:55:46,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 02:55:46,909 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 1464 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:46,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 1341 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 02:55:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2024-11-14 02:55:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8246. [2024-11-14 02:55:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8246 states, 8245 states have (on average 1.2625833838690115) internal successors, (10410), 8245 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8246 states to 8246 states and 10410 transitions. [2024-11-14 02:55:47,170 INFO L78 Accepts]: Start accepts. Automaton has 8246 states and 10410 transitions. Word has length 137 [2024-11-14 02:55:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:47,170 INFO L471 AbstractCegarLoop]: Abstraction has 8246 states and 10410 transitions. [2024-11-14 02:55:47,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 15.72972972972973) internal successors, (582), 37 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8246 states and 10410 transitions. [2024-11-14 02:55:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 02:55:47,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:47,171 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:55:47,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2024-11-14 02:55:47,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2024-11-14 02:55:47,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 02:55:47,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:47,772 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:47,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1285446101, now seen corresponding path program 1 times [2024-11-14 02:55:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937301585] [2024-11-14 02:55:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:47,775 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:47,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2024-11-14 02:55:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:48,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:48,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:48,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:49,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937301585] [2024-11-14 02:55:49,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937301585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495381592] [2024-11-14 02:55:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:49,431 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:49,433 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:49,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2024-11-14 02:55:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:49,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:49,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:50,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [495381592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256848640] [2024-11-14 02:55:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:51,323 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:51,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 02:55:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:51,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:55:51,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:52,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256848640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:53,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:55:53,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2024-11-14 02:55:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441418611] [2024-11-14 02:55:53,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:53,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:55:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:55:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:55:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:55:53,235 INFO L87 Difference]: Start difference. First operand 8246 states and 10410 transitions. Second operand has 37 states, 37 states have (on average 16.16216216216216) internal successors, (598), 37 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:56,321 INFO L93 Difference]: Finished difference Result 23760 states and 30071 transitions. [2024-11-14 02:55:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 02:55:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 16.16216216216216) internal successors, (598), 37 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-11-14 02:55:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:56,334 INFO L225 Difference]: With dead ends: 23760 [2024-11-14 02:55:56,334 INFO L226 Difference]: Without dead ends: 15789 [2024-11-14 02:55:56,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 02:55:56,340 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 1892 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:56,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1892 Valid, 1680 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 02:55:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15789 states. [2024-11-14 02:55:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15789 to 15783. [2024-11-14 02:55:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15783 states, 15782 states have (on average 1.2463566087948295) internal successors, (19670), 15782 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15783 states to 15783 states and 19670 transitions. [2024-11-14 02:55:56,908 INFO L78 Accepts]: Start accepts. Automaton has 15783 states and 19670 transitions. Word has length 138 [2024-11-14 02:55:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:56,908 INFO L471 AbstractCegarLoop]: Abstraction has 15783 states and 19670 transitions. [2024-11-14 02:55:56,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 16.16216216216216) internal successors, (598), 37 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 15783 states and 19670 transitions. [2024-11-14 02:55:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 02:55:56,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:56,909 INFO L215 NwaCegarLoop]: trace histogram [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 02:55:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:57,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2024-11-14 02:55:57,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-11-14 02:55:57,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:57,510 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:57,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1198142422, now seen corresponding path program 1 times [2024-11-14 02:55:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:55:57,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949840884] [2024-11-14 02:55:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:57,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:55:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:55:57,513 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:55:57,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2024-11-14 02:55:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:57,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:55:57,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:58,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:59,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:55:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949840884] [2024-11-14 02:55:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949840884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [592338824] [2024-11-14 02:55:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:59,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:55:59,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:55:59,158 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:55:59,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2024-11-14 02:55:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:59,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:55:59,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [592338824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932191544] [2024-11-14 02:56:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:01,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:01,098 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:01,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8cf4f65-8781-4228-8af5-24787294ce52/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-14 02:56:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:01,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:56:01,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:02,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932191544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:03,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:56:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2024-11-14 02:56:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724538490] [2024-11-14 02:56:03,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:03,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:56:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:56:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:56:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:56:03,148 INFO L87 Difference]: Start difference. First operand 15783 states and 19670 transitions. Second operand has 37 states, 37 states have (on average 16.56756756756757) internal successors, (613), 37 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)