./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.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_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:44:52,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:44:52,366 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:44:52,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:44:52,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:44:52,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:44:52,392 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:44:52,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:44:52,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:44:52,393 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:44:52,393 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:44:52,394 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:44:52,394 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:44:52,394 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:44:52,394 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:44:52,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:44:52,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:44:52,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:44:52,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:44:52,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:44:52,396 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:44:52,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:44:52,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:44:52,397 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:44:52,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:44:52,397 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 -> a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b [2024-11-14 04:44:52,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:44:52,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:44:52,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:44:52,688 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:44:52,689 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:44:52,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c Unable to find full path for "g++" [2024-11-14 04:44:54,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:44:54,842 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:44:54,843 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2024-11-14 04:44:54,850 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/34c1573bb/f417ab0585c8466480c02c1db4f6b0d9/FLAG52b1145c4 [2024-11-14 04:44:54,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/34c1573bb/f417ab0585c8466480c02c1db4f6b0d9 [2024-11-14 04:44:54,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:44:54,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:44:54,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:44:54,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:44:54,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:44:54,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:44:54" (1/1) ... [2024-11-14 04:44:54,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198bb9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:54, skipping insertion in model container [2024-11-14 04:44:54,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:44:54" (1/1) ... [2024-11-14 04:44:54,893 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:44:55,087 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2024-11-14 04:44:55,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:44:55,099 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:44:55,148 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2024-11-14 04:44:55,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:44:55,164 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:44:55,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55 WrapperNode [2024-11-14 04:44:55,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:44:55,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:44:55,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:44:55,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:44:55,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,203 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 249 [2024-11-14 04:44:55,203 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:44:55,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:44:55,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:44:55,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:44:55,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:44:55,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:44:55,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:44:55,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:44:55,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (1/1) ... [2024-11-14 04:44:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:44:55,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:55,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:44:55,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:44:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:44:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:44:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:44:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:44:55,386 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:44:55,388 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:44:55,825 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-14 04:44:55,825 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:44:56,224 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:44:56,224 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:44:56,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:44:56 BoogieIcfgContainer [2024-11-14 04:44:56,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:44:56,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:44:56,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:44:56,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:44:56,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:44:54" (1/3) ... [2024-11-14 04:44:56,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44113d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:44:56, skipping insertion in model container [2024-11-14 04:44:56,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:44:55" (2/3) ... [2024-11-14 04:44:56,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44113d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:44:56, skipping insertion in model container [2024-11-14 04:44:56,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:44:56" (3/3) ... [2024-11-14 04:44:56,237 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2024-11-14 04:44:56,252 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:44:56,254 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c that has 1 procedures, 7 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:44:56,312 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:44:56,327 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;@397bb88b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:44:56,327 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:44:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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 04:44:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:44:56,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:56,339 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:44:56,339 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:44:56,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 12482646, now seen corresponding path program 1 times [2024-11-14 04:44:56,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041220099] [2024-11-14 04:44:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:44:58,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:58,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041220099] [2024-11-14 04:44:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041220099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:44:58,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:44:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:44:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531056353] [2024-11-14 04:44:58,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:44:58,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:44:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:44:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:44:58,173 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 04:44:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:58,234 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-14 04:44:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:44:58,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2024-11-14 04:44:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:58,242 INFO L225 Difference]: With dead ends: 16 [2024-11-14 04:44:58,242 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 04:44:58,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:44:58,247 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:58,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:44:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 04:44:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 04:44:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 04:44:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2024-11-14 04:44:58,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2024-11-14 04:44:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:58,282 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2024-11-14 04:44:58,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 04:44:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2024-11-14 04:44:58,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:44:58,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:58,283 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-14 04:44:58,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:44:58,284 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:44:58,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1786493706, now seen corresponding path program 1 times [2024-11-14 04:44:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:58,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912603006] [2024-11-14 04:44:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:45:03,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:45:03,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912603006] [2024-11-14 04:45:03,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912603006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:45:03,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489811793] [2024-11-14 04:45:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:03,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:45:03,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:45:03,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:45:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:03,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:45:03,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:45:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:45:07,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:45:27,964 WARN L286 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 185 DAG size of output: 176 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:54:00,645 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:00,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068220796] [2024-11-14 04:54:00,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2024-11-14 04:54:00,665 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:54:00,666 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:00,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:00,674 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:00,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:00,696 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:00,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:54:00,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2024-11-14 04:54:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288421663] [2024-11-14 04:54:00,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:54:00,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:00,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:54:00,704 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 04:54:00,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:54:00,705 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 04:54:00,706 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 04:54:00,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:54:00,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:00,907 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:00,913 INFO L158 Benchmark]: Toolchain (without parser) took 546045.52ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 92.7MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 292.3MB. Max. memory is 16.1GB. [2024-11-14 04:54:00,913 INFO L158 Benchmark]: CDTParser took 1.18ms. Allocated memory is still 117.4MB. Free memory is still 75.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:54:00,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.33ms. Allocated memory is still 117.4MB. Free memory was 92.6MB in the beginning and 78.5MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:54:00,914 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.77ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:54:00,914 INFO L158 Benchmark]: Boogie Preprocessor took 31.11ms. Allocated memory is still 117.4MB. Free memory was 76.5MB in the beginning and 75.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:54:00,915 INFO L158 Benchmark]: RCFGBuilder took 989.77ms. Allocated memory is still 117.4MB. Free memory was 75.0MB in the beginning and 52.8MB in the end (delta: 22.2MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. [2024-11-14 04:54:00,915 INFO L158 Benchmark]: TraceAbstraction took 544680.63ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 52.3MB in the beginning and 1.4GB in the end (delta: -1.4GB). Peak memory consumption was 254.2MB. Max. memory is 16.1GB. [2024-11-14 04:54:00,920 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18ms. Allocated memory is still 117.4MB. Free memory is still 75.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.33ms. Allocated memory is still 117.4MB. Free memory was 92.6MB in the beginning and 78.5MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.77ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.11ms. Allocated memory is still 117.4MB. Free memory was 76.5MB in the beginning and 75.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 989.77ms. Allocated memory is still 117.4MB. Free memory was 75.0MB in the beginning and 52.8MB in the end (delta: 22.2MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. * TraceAbstraction took 544680.63ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 52.3MB in the beginning and 1.4GB in the end (delta: -1.4GB). Peak memory consumption was 254.2MB. 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:54:03,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:54:03,770 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-14 04:54:03,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:54:03,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:54:03,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:54:03,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:54:03,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:54:03,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:54:03,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:54:03,874 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:54:03,875 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:54:03,875 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:54:03,875 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:54:03,875 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:54:03,875 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:54:03,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:54:03,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:54:03,878 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:54:03,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:54:03,879 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 04:54:03,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:54:03,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:54:03,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:54:03,880 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:54:03,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:54:03,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:54:03,881 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 04:54:03,881 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:03,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:54:03,881 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:54:03,882 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 -> a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b [2024-11-14 04:54:04,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:54:04,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:54:04,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:54:04,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:54:04,263 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:54:04,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c Unable to find full path for "g++" [2024-11-14 04:54:06,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:54:06,981 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:54:06,984 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2024-11-14 04:54:06,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/dfbd42d78/067932bd758e48f58eee9f333af9949c/FLAGf132c7051 [2024-11-14 04:54:07,026 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/data/dfbd42d78/067932bd758e48f58eee9f333af9949c [2024-11-14 04:54:07,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:54:07,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:54:07,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:54:07,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:54:07,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:54:07,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f5d2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07, skipping insertion in model container [2024-11-14 04:54:07,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,074 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:54:07,337 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2024-11-14 04:54:07,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:54:07,353 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:54:07,398 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_d1e89aed-cb53-4e6b-8879-45a36d24de14/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2024-11-14 04:54:07,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:54:07,417 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:54:07,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07 WrapperNode [2024-11-14 04:54:07,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:54:07,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:54:07,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:54:07,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:54:07,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,470 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 237 [2024-11-14 04:54:07,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:54:07,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:54:07,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:54:07,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:54:07,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:54:07,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:54:07,529 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:54:07,529 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:54:07,530 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (1/1) ... [2024-11-14 04:54:07,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:54:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:07,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:54:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:54:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:54:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 04:54:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:54:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:54:07,759 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:54:07,762 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:54:08,397 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-14 04:54:08,397 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:54:08,410 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:54:08,411 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:54:08,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:54:08 BoogieIcfgContainer [2024-11-14 04:54:08,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:54:08,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:54:08,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:54:08,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:54:08,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:54:07" (1/3) ... [2024-11-14 04:54:08,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95f5aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:54:08, skipping insertion in model container [2024-11-14 04:54:08,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:07" (2/3) ... [2024-11-14 04:54:08,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95f5aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:54:08, skipping insertion in model container [2024-11-14 04:54:08,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:54:08" (3/3) ... [2024-11-14 04:54:08,424 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2024-11-14 04:54:08,445 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:54:08,447 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c that has 1 procedures, 67 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:54:08,533 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:54:08,553 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;@4c6cd288, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:54:08,553 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:54:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 66 states have internal predecessors, (111), 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 04:54:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:54:08,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:08,569 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] [2024-11-14 04:54:08,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:08,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110195, now seen corresponding path program 1 times [2024-11-14 04:54:08,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:08,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178896378] [2024-11-14 04:54:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:08,594 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 04:54:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:08,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:08,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:08,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:08,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:08,877 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:08,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:08,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178896378] [2024-11-14 04:54:08,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178896378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:08,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:08,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334359186] [2024-11-14 04:54:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:08,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:08,926 INFO L87 Difference]: Start difference. First operand has 67 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 66 states have internal predecessors, (111), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 04:54:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:09,086 INFO L93 Difference]: Finished difference Result 155 states and 253 transitions. [2024-11-14 04:54:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2024-11-14 04:54:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:09,098 INFO L225 Difference]: With dead ends: 155 [2024-11-14 04:54:09,099 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 04:54:09,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:09,106 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:09,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 391 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 04:54:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 63. [2024-11-14 04:54:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 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 04:54:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2024-11-14 04:54:09,160 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 25 [2024-11-14 04:54:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:09,161 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2024-11-14 04:54:09,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 04:54:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2024-11-14 04:54:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:54:09,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:09,163 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] [2024-11-14 04:54:09,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,364 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:09,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1423783485, now seen corresponding path program 1 times [2024-11-14 04:54:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:09,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735725270] [2024-11-14 04:54:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:09,366 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 04:54:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:09,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:09,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:09,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:09,619 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:09,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735725270] [2024-11-14 04:54:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735725270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:09,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:09,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816677395] [2024-11-14 04:54:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:09,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:09,625 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 04:54:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:09,667 INFO L93 Difference]: Finished difference Result 135 states and 201 transitions. [2024-11-14 04:54:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:09,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2024-11-14 04:54:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:09,670 INFO L225 Difference]: With dead ends: 135 [2024-11-14 04:54:09,670 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 04:54:09,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:09,671 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 44 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:09,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 168 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 04:54:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-11-14 04:54:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 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 04:54:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 135 transitions. [2024-11-14 04:54:09,682 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 135 transitions. Word has length 41 [2024-11-14 04:54:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:09,683 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 135 transitions. [2024-11-14 04:54:09,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 04:54:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 135 transitions. [2024-11-14 04:54:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:54:09,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:09,685 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] [2024-11-14 04:54:09,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Ended with exit code 0 [2024-11-14 04:54:09,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,888 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:09,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1976928132, now seen corresponding path program 1 times [2024-11-14 04:54:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541313233] [2024-11-14 04:54:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:09,890 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 04:54:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:09,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:09,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:10,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:10,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:10,599 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:10,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:10,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541313233] [2024-11-14 04:54:10,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541313233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:10,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:10,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:10,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152519576] [2024-11-14 04:54:10,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:10,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:10,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:10,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:10,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:10,601 INFO L87 Difference]: Start difference. First operand 93 states and 135 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 04:54:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:10,726 INFO L93 Difference]: Finished difference Result 373 states and 583 transitions. [2024-11-14 04:54:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2024-11-14 04:54:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:10,730 INFO L225 Difference]: With dead ends: 373 [2024-11-14 04:54:10,730 INFO L226 Difference]: Without dead ends: 303 [2024-11-14 04:54:10,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:10,732 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 173 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:10,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 364 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-14 04:54:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 161. [2024-11-14 04:54:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.5125) internal successors, (242), 160 states have internal predecessors, (242), 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 04:54:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 242 transitions. [2024-11-14 04:54:10,753 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 242 transitions. Word has length 41 [2024-11-14 04:54:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:10,754 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 242 transitions. [2024-11-14 04:54:10,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 04:54:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 242 transitions. [2024-11-14 04:54:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 04:54:10,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:10,756 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] [2024-11-14 04:54:10,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:10,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:10,957 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:10,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 771906485, now seen corresponding path program 1 times [2024-11-14 04:54:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518119934] [2024-11-14 04:54:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:10,961 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 04:54:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:10,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:10,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:11,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:54:11,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:11,146 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:11,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518119934] [2024-11-14 04:54:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518119934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:11,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:11,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061010822] [2024-11-14 04:54:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:11,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:11,150 INFO L87 Difference]: Start difference. First operand 161 states and 242 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 04:54:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:11,200 INFO L93 Difference]: Finished difference Result 175 states and 259 transitions. [2024-11-14 04:54:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2024-11-14 04:54:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:11,203 INFO L225 Difference]: With dead ends: 175 [2024-11-14 04:54:11,205 INFO L226 Difference]: Without dead ends: 173 [2024-11-14 04:54:11,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:11,206 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:11,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 328 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-14 04:54:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-11-14 04:54:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4767441860465116) internal successors, (254), 172 states have internal predecessors, (254), 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 04:54:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 254 transitions. [2024-11-14 04:54:11,244 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 254 transitions. Word has length 42 [2024-11-14 04:54:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:11,245 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 254 transitions. [2024-11-14 04:54:11,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 04:54:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 254 transitions. [2024-11-14 04:54:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:54:11,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:11,250 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] [2024-11-14 04:54:11,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,453 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:11,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1788124292, now seen corresponding path program 1 times [2024-11-14 04:54:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612284894] [2024-11-14 04:54:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:11,454 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 04:54:11,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:11,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:11,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:11,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:11,681 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:11,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612284894] [2024-11-14 04:54:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612284894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:11,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:11,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033545264] [2024-11-14 04:54:11,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:11,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:11,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:11,684 INFO L87 Difference]: Start difference. First operand 173 states and 254 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 04:54:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:11,713 INFO L93 Difference]: Finished difference Result 443 states and 666 transitions. [2024-11-14 04:54:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2024-11-14 04:54:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:11,715 INFO L225 Difference]: With dead ends: 443 [2024-11-14 04:54:11,716 INFO L226 Difference]: Without dead ends: 293 [2024-11-14 04:54:11,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:11,717 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 37 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:11,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-14 04:54:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2024-11-14 04:54:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4827586206896552) internal successors, (430), 290 states have internal predecessors, (430), 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 04:54:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 430 transitions. [2024-11-14 04:54:11,740 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 430 transitions. Word has length 43 [2024-11-14 04:54:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:11,740 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 430 transitions. [2024-11-14 04:54:11,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 04:54:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 430 transitions. [2024-11-14 04:54:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:54:11,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:11,742 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] [2024-11-14 04:54:11,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,945 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:11,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash -388619525, now seen corresponding path program 1 times [2024-11-14 04:54:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362926404] [2024-11-14 04:54:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:11,946 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 04:54:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:11,951 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:12,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:12,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:12,112 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:12,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362926404] [2024-11-14 04:54:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362926404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:12,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:12,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:12,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56651877] [2024-11-14 04:54:12,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:12,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:12,115 INFO L87 Difference]: Start difference. First operand 291 states and 430 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 04:54:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:12,149 INFO L93 Difference]: Finished difference Result 561 states and 839 transitions. [2024-11-14 04:54:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2024-11-14 04:54:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:12,152 INFO L225 Difference]: With dead ends: 561 [2024-11-14 04:54:12,152 INFO L226 Difference]: Without dead ends: 411 [2024-11-14 04:54:12,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:12,153 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:12,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 191 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-14 04:54:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2024-11-14 04:54:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.4754901960784315) internal successors, (602), 408 states have internal predecessors, (602), 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 04:54:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 602 transitions. [2024-11-14 04:54:12,188 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 602 transitions. Word has length 43 [2024-11-14 04:54:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:12,189 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 602 transitions. [2024-11-14 04:54:12,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 04:54:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 602 transitions. [2024-11-14 04:54:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:54:12,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:12,191 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] [2024-11-14 04:54:12,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,392 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:12,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1862889454, now seen corresponding path program 1 times [2024-11-14 04:54:12,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601369200] [2024-11-14 04:54:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:12,393 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 04:54:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:12,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:12,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:12,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:12,585 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:12,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:12,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601369200] [2024-11-14 04:54:12,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601369200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:12,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:12,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:12,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394393419] [2024-11-14 04:54:12,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:12,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:12,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:12,588 INFO L87 Difference]: Start difference. First operand 409 states and 602 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 04:54:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:12,641 INFO L93 Difference]: Finished difference Result 1081 states and 1588 transitions. [2024-11-14 04:54:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2024-11-14 04:54:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:12,650 INFO L225 Difference]: With dead ends: 1081 [2024-11-14 04:54:12,651 INFO L226 Difference]: Without dead ends: 697 [2024-11-14 04:54:12,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:12,654 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 48 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:12,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 191 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2024-11-14 04:54:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2024-11-14 04:54:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.4380403458213256) internal successors, (998), 694 states have internal predecessors, (998), 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 04:54:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 998 transitions. [2024-11-14 04:54:12,714 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 998 transitions. Word has length 44 [2024-11-14 04:54:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:12,715 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 998 transitions. [2024-11-14 04:54:12,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 04:54:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 998 transitions. [2024-11-14 04:54:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:54:12,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:12,722 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,923 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:12,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -708127247, now seen corresponding path program 1 times [2024-11-14 04:54:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:12,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560829045] [2024-11-14 04:54:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:12,924 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 04:54:12,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:12,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:13,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:54:13,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:14,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:14,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560829045] [2024-11-14 04:54:14,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560829045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1213928512] [2024-11-14 04:54:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:14,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:14,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:14,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-14 04:54:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:14,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:14,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:15,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:15,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1213928512] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:15,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:54:15,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8, 4] total 19 [2024-11-14 04:54:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415222171] [2024-11-14 04:54:15,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:15,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:15,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:15,163 INFO L87 Difference]: Start difference. First operand 695 states and 998 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 04:54:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:15,202 INFO L93 Difference]: Finished difference Result 1367 states and 1972 transitions. [2024-11-14 04:54:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2024-11-14 04:54:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:15,210 INFO L225 Difference]: With dead ends: 1367 [2024-11-14 04:54:15,210 INFO L226 Difference]: Without dead ends: 697 [2024-11-14 04:54:15,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 227 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 04:54:15,212 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:15,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 182 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2024-11-14 04:54:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2024-11-14 04:54:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.420749279538905) internal successors, (986), 694 states have internal predecessors, (986), 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 04:54:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 986 transitions. [2024-11-14 04:54:15,271 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 986 transitions. Word has length 62 [2024-11-14 04:54:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:15,272 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 986 transitions. [2024-11-14 04:54:15,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 04:54:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 986 transitions. [2024-11-14 04:54:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:54:15,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:15,274 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:15,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:15,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:15,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:15,675 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:15,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2101816560, now seen corresponding path program 1 times [2024-11-14 04:54:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172893967] [2024-11-14 04:54:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:15,676 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 04:54:15,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:15,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:15,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:15,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:54:15,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:16,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:17,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172893967] [2024-11-14 04:54:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172893967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381353096] [2024-11-14 04:54:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:17,161 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:17,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-14 04:54:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:17,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:17,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:17,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1381353096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263063704] [2024-11-14 04:54:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:17,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:17,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:17,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:54:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:17,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:17,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:18,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263063704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:18,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 04:54:18,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 4] total 20 [2024-11-14 04:54:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718189789] [2024-11-14 04:54:18,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 04:54:18,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:54:18,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:54:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:54:18,205 INFO L87 Difference]: Start difference. First operand 695 states and 986 transitions. Second operand has 20 states, 20 states have (on average 10.85) internal successors, (217), 20 states have internal predecessors, (217), 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 04:54:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:21,207 INFO L93 Difference]: Finished difference Result 4389 states and 6252 transitions. [2024-11-14 04:54:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 04:54:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.85) internal successors, (217), 20 states have internal predecessors, (217), 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 62 [2024-11-14 04:54:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:21,222 INFO L225 Difference]: With dead ends: 4389 [2024-11-14 04:54:21,222 INFO L226 Difference]: Without dead ends: 3923 [2024-11-14 04:54:21,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=730, Invalid=2692, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 04:54:21,226 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 2890 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2890 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:21,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2890 Valid, 1142 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:54:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2024-11-14 04:54:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3211. [2024-11-14 04:54:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 1.4137071651090343) internal successors, (4538), 3210 states have internal predecessors, (4538), 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 04:54:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4538 transitions. [2024-11-14 04:54:21,369 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4538 transitions. Word has length 62 [2024-11-14 04:54:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:21,370 INFO L471 AbstractCegarLoop]: Abstraction has 3211 states and 4538 transitions. [2024-11-14 04:54:21,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.85) internal successors, (217), 20 states have internal predecessors, (217), 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 04:54:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4538 transitions. [2024-11-14 04:54:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:54:21,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:21,372 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:21,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:21,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:21,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:54:21,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:21,974 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:21,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1941422954, now seen corresponding path program 1 times [2024-11-14 04:54:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706955319] [2024-11-14 04:54:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:21,975 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 04:54:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:21,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:21,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:22,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:22,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:22,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:22,087 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706955319] [2024-11-14 04:54:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706955319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:22,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:22,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:22,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863350316] [2024-11-14 04:54:22,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:22,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:22,088 INFO L87 Difference]: Start difference. First operand 3211 states and 4538 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 04:54:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:22,137 INFO L93 Difference]: Finished difference Result 4460 states and 6283 transitions. [2024-11-14 04:54:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2024-11-14 04:54:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:22,142 INFO L225 Difference]: With dead ends: 4460 [2024-11-14 04:54:22,142 INFO L226 Difference]: Without dead ends: 1274 [2024-11-14 04:54:22,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:22,145 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:22,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2024-11-14 04:54:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1212. [2024-11-14 04:54:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.3806771263418662) internal successors, (1672), 1211 states have internal predecessors, (1672), 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 04:54:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1672 transitions. [2024-11-14 04:54:22,217 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1672 transitions. Word has length 63 [2024-11-14 04:54:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:22,217 INFO L471 AbstractCegarLoop]: Abstraction has 1212 states and 1672 transitions. [2024-11-14 04:54:22,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 04:54:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1672 transitions. [2024-11-14 04:54:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:54:22,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:22,218 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:22,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:22,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:22,421 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:22,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1481145803, now seen corresponding path program 1 times [2024-11-14 04:54:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:22,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838377951] [2024-11-14 04:54:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:22,423 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 04:54:22,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:22,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:22,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:54:22,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:23,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:23,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:23,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838377951] [2024-11-14 04:54:23,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838377951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:23,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [27999697] [2024-11-14 04:54:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:23,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:23,485 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:23,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-14 04:54:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:23,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:23,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:23,972 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [27999697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:23,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:54:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 8] total 19 [2024-11-14 04:54:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529685784] [2024-11-14 04:54:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:23,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:23,973 INFO L87 Difference]: Start difference. First operand 1212 states and 1672 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:24,090 INFO L93 Difference]: Finished difference Result 2770 states and 3876 transitions. [2024-11-14 04:54:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 63 [2024-11-14 04:54:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:24,098 INFO L225 Difference]: With dead ends: 2770 [2024-11-14 04:54:24,098 INFO L226 Difference]: Without dead ends: 2207 [2024-11-14 04:54:24,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:24,100 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 179 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:24,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 358 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2024-11-14 04:54:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1740. [2024-11-14 04:54:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 1.3737780333525014) internal successors, (2389), 1739 states have internal predecessors, (2389), 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 04:54:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2389 transitions. [2024-11-14 04:54:24,170 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2389 transitions. Word has length 63 [2024-11-14 04:54:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:24,170 INFO L471 AbstractCegarLoop]: Abstraction has 1740 states and 2389 transitions. [2024-11-14 04:54:24,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:24,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2389 transitions. [2024-11-14 04:54:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 04:54:24,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:24,172 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:24,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:24,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:24,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:24,573 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:24,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash -889667868, now seen corresponding path program 1 times [2024-11-14 04:54:24,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:24,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463891361] [2024-11-14 04:54:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:24,574 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 04:54:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:24,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:24,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Waiting until timeout for monitored process [2024-11-14 04:54:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:24,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:24,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:24,693 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:24,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463891361] [2024-11-14 04:54:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463891361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:24,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:24,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653815517] [2024-11-14 04:54:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:24,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:24,694 INFO L87 Difference]: Start difference. First operand 1740 states and 2389 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 04:54:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:24,786 INFO L93 Difference]: Finished difference Result 4480 states and 6141 transitions. [2024-11-14 04:54:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2024-11-14 04:54:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:24,794 INFO L225 Difference]: With dead ends: 4480 [2024-11-14 04:54:24,794 INFO L226 Difference]: Without dead ends: 2851 [2024-11-14 04:54:24,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:24,797 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 40 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:24,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 164 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2024-11-14 04:54:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2849. [2024-11-14 04:54:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 1.3441011235955056) internal successors, (3828), 2848 states have internal predecessors, (3828), 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 04:54:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 3828 transitions. [2024-11-14 04:54:24,908 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 3828 transitions. Word has length 64 [2024-11-14 04:54:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:24,909 INFO L471 AbstractCegarLoop]: Abstraction has 2849 states and 3828 transitions. [2024-11-14 04:54:24,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 04:54:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 3828 transitions. [2024-11-14 04:54:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 04:54:24,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:24,911 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:24,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Ended with exit code 0 [2024-11-14 04:54:25,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:25,113 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:25,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 319402902, now seen corresponding path program 1 times [2024-11-14 04:54:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549070315] [2024-11-14 04:54:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:25,115 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 04:54:25,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:25,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:25,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:25,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:54:25,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:25,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:26,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:26,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549070315] [2024-11-14 04:54:26,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549070315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:26,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392858841] [2024-11-14 04:54:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:26,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:26,155 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-14 04:54:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:26,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:26,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:54:26,702 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392858841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:26,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:54:26,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 8] total 19 [2024-11-14 04:54:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784697673] [2024-11-14 04:54:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:26,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:26,704 INFO L87 Difference]: Start difference. First operand 2849 states and 3828 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:26,850 INFO L93 Difference]: Finished difference Result 5309 states and 7226 transitions. [2024-11-14 04:54:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 64 [2024-11-14 04:54:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:26,863 INFO L225 Difference]: With dead ends: 5309 [2024-11-14 04:54:26,863 INFO L226 Difference]: Without dead ends: 4212 [2024-11-14 04:54:26,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:26,866 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 147 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:26,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 393 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4212 states. [2024-11-14 04:54:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4212 to 3754. [2024-11-14 04:54:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 1.335997868371969) internal successors, (5014), 3753 states have internal predecessors, (5014), 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 04:54:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5014 transitions. [2024-11-14 04:54:27,033 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5014 transitions. Word has length 64 [2024-11-14 04:54:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:27,033 INFO L471 AbstractCegarLoop]: Abstraction has 3754 states and 5014 transitions. [2024-11-14 04:54:27,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5014 transitions. [2024-11-14 04:54:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 04:54:27,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:27,041 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:27,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-14 04:54:27,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:27,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:27,441 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:27,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1860219048, now seen corresponding path program 1 times [2024-11-14 04:54:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:27,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082508327] [2024-11-14 04:54:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:27,443 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 04:54:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:27,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:27,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:27,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:54:27,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:28,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:28,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082508327] [2024-11-14 04:54:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082508327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [503787155] [2024-11-14 04:54:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:28,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:28,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:28,349 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:28,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-14 04:54:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:28,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:54:28,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:28,525 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [503787155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:28,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:54:28,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2024-11-14 04:54:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020702786] [2024-11-14 04:54:28,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:28,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:28,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:54:28,527 INFO L87 Difference]: Start difference. First operand 3754 states and 5014 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 04:54:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:28,676 INFO L93 Difference]: Finished difference Result 8901 states and 11812 transitions. [2024-11-14 04:54:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2024-11-14 04:54:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:28,689 INFO L225 Difference]: With dead ends: 8901 [2024-11-14 04:54:28,689 INFO L226 Difference]: Without dead ends: 5436 [2024-11-14 04:54:28,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:54:28,693 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 37 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:28,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:54:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2024-11-14 04:54:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 5407. [2024-11-14 04:54:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5406 states have (on average 1.295967443581206) internal successors, (7006), 5406 states have internal predecessors, (7006), 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 04:54:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 7006 transitions. [2024-11-14 04:54:28,878 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 7006 transitions. Word has length 64 [2024-11-14 04:54:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:28,879 INFO L471 AbstractCegarLoop]: Abstraction has 5407 states and 7006 transitions. [2024-11-14 04:54:28,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 04:54:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 7006 transitions. [2024-11-14 04:54:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 04:54:28,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:28,881 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:28,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:29,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-14 04:54:29,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:29,283 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:29,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 567835401, now seen corresponding path program 1 times [2024-11-14 04:54:29,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:29,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797925421] [2024-11-14 04:54:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:29,284 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 04:54:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:29,286 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:29,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:29,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:54:29,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:29,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:30,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797925421] [2024-11-14 04:54:30,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797925421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534483074] [2024-11-14 04:54:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:30,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:30,214 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-14 04:54:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:30,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:54:30,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:54:30,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534483074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:30,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:54:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 19 [2024-11-14 04:54:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456978550] [2024-11-14 04:54:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:30,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:30,650 INFO L87 Difference]: Start difference. First operand 5407 states and 7006 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:30,843 INFO L93 Difference]: Finished difference Result 8427 states and 11072 transitions. [2024-11-14 04:54:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 65 [2024-11-14 04:54:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:30,861 INFO L225 Difference]: With dead ends: 8427 [2024-11-14 04:54:30,861 INFO L226 Difference]: Without dead ends: 7182 [2024-11-14 04:54:30,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:54:30,864 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 148 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:30,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 392 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2024-11-14 04:54:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 6540. [2024-11-14 04:54:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 1.2922465208747516) internal successors, (8450), 6539 states have internal predecessors, (8450), 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 04:54:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 8450 transitions. [2024-11-14 04:54:31,102 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 8450 transitions. Word has length 65 [2024-11-14 04:54:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:31,102 INFO L471 AbstractCegarLoop]: Abstraction has 6540 states and 8450 transitions. [2024-11-14 04:54:31,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 04:54:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 8450 transitions. [2024-11-14 04:54:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 04:54:31,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:31,104 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:31,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-14 04:54:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:31,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:31,505 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:31,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2064401306, now seen corresponding path program 1 times [2024-11-14 04:54:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:54:31,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216016334] [2024-11-14 04:54:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:31,506 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 04:54:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:54:31,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:31,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:54:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:31,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:54:31,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:32,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:32,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:54:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216016334] [2024-11-14 04:54:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216016334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:32,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825155084] [2024-11-14 04:54:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:32,366 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:54:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:54:32,367 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:54:32,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-14 04:54:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:32,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:54:32,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:33,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:33,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825155084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059182130] [2024-11-14 04:54:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:33,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:33,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:33,573 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:33,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 04:54:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:33,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:54:33,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:34,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:34,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059182130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:34,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 04:54:34,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 44 [2024-11-14 04:54:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725281889] [2024-11-14 04:54:34,990 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 04:54:34,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:54:34,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:54:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:54:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 04:54:34,993 INFO L87 Difference]: Start difference. First operand 6540 states and 8450 transitions. Second operand has 44 states, 44 states have (on average 7.363636363636363) internal successors, (324), 44 states have internal predecessors, (324), 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 04:55:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:37,865 INFO L93 Difference]: Finished difference Result 67243 states and 88154 transitions. [2024-11-14 04:55:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 512 states. [2024-11-14 04:55:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 7.363636363636363) internal successors, (324), 44 states have internal predecessors, (324), 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 66 [2024-11-14 04:55:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:37,994 INFO L225 Difference]: With dead ends: 67243 [2024-11-14 04:55:37,994 INFO L226 Difference]: Without dead ends: 60763 [2024-11-14 04:55:38,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140612 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=33762, Invalid=272600, Unknown=0, NotChecked=0, Total=306362 [2024-11-14 04:55:38,040 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 11033 mSDsluCounter, 3857 mSDsCounter, 0 mSdLazyCounter, 4203 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11033 SdHoareTripleChecker+Valid, 4015 SdHoareTripleChecker+Invalid, 4554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 4203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:38,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11033 Valid, 4015 Invalid, 4554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 4203 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-14 04:55:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60763 states. [2024-11-14 04:55:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60763 to 30571. [2024-11-14 04:55:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30571 states, 30570 states have (on average 1.2922145894667976) internal successors, (39503), 30570 states have internal predecessors, (39503), 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 04:55:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30571 states to 30571 states and 39503 transitions. [2024-11-14 04:55:39,335 INFO L78 Accepts]: Start accepts. Automaton has 30571 states and 39503 transitions. Word has length 66 [2024-11-14 04:55:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:39,335 INFO L471 AbstractCegarLoop]: Abstraction has 30571 states and 39503 transitions. [2024-11-14 04:55:39,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.363636363636363) internal successors, (324), 44 states have internal predecessors, (324), 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 04:55:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30571 states and 39503 transitions. [2024-11-14 04:55:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 04:55:39,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:39,350 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:55:39,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:39,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 04:55:39,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:39,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:39,951 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:39,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1862010994, now seen corresponding path program 1 times [2024-11-14 04:55:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040277211] [2024-11-14 04:55:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:39,952 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 04:55:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:39,956 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:39,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Waiting until timeout for monitored process [2024-11-14 04:55:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:40,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:55:40,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:55:40,077 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:55:40,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:40,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040277211] [2024-11-14 04:55:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040277211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:40,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:55:40,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:55:40,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187648980] [2024-11-14 04:55:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:40,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:55:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:55:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:55:40,079 INFO L87 Difference]: Start difference. First operand 30571 states and 39503 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 04:55:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:40,767 INFO L93 Difference]: Finished difference Result 44706 states and 57595 transitions. [2024-11-14 04:55:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:55:40,768 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 106 [2024-11-14 04:55:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:40,805 INFO L225 Difference]: With dead ends: 44706 [2024-11-14 04:55:40,805 INFO L226 Difference]: Without dead ends: 17326 [2024-11-14 04:55:40,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:55:40,828 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:40,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:55:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17326 states. [2024-11-14 04:55:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17326 to 16677. [2024-11-14 04:55:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16677 states, 16676 states have (on average 1.2570160710002398) internal successors, (20962), 16676 states have internal predecessors, (20962), 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 04:55:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16677 states to 16677 states and 20962 transitions. [2024-11-14 04:55:41,817 INFO L78 Accepts]: Start accepts. Automaton has 16677 states and 20962 transitions. Word has length 106 [2024-11-14 04:55:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:41,817 INFO L471 AbstractCegarLoop]: Abstraction has 16677 states and 20962 transitions. [2024-11-14 04:55:41,818 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 04:55:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16677 states and 20962 transitions. [2024-11-14 04:55:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 04:55:41,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:41,829 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:55:41,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Ended with exit code 0 [2024-11-14 04:55:42,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:42,030 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:42,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1290768847, now seen corresponding path program 1 times [2024-11-14 04:55:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840406352] [2024-11-14 04:55:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:42,031 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 04:55:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:42,033 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:42,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:42,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:55:42,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:55:42,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:55:42,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840406352] [2024-11-14 04:55:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840406352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555111109] [2024-11-14 04:55:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:42,434 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:55:42,436 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:55:42,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-14 04:55:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:42,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:55:42,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 04:55:42,703 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:55:42,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555111109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:42,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:55:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 10 [2024-11-14 04:55:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642417105] [2024-11-14 04:55:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:42,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:55:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:55:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:55:42,705 INFO L87 Difference]: Start difference. First operand 16677 states and 20962 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 04:55:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:43,183 INFO L93 Difference]: Finished difference Result 36166 states and 45071 transitions. [2024-11-14 04:55:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:55:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 108 [2024-11-14 04:55:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:43,205 INFO L225 Difference]: With dead ends: 36166 [2024-11-14 04:55:43,205 INFO L226 Difference]: Without dead ends: 19009 [2024-11-14 04:55:43,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:55:43,219 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 25 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:43,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 212 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:55:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2024-11-14 04:55:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15508. [2024-11-14 04:55:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15508 states, 15507 states have (on average 1.2020377893854388) internal successors, (18640), 15507 states have internal predecessors, (18640), 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 04:55:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15508 states to 15508 states and 18640 transitions. [2024-11-14 04:55:43,813 INFO L78 Accepts]: Start accepts. Automaton has 15508 states and 18640 transitions. Word has length 108 [2024-11-14 04:55:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:43,813 INFO L471 AbstractCegarLoop]: Abstraction has 15508 states and 18640 transitions. [2024-11-14 04:55:43,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 04:55:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15508 states and 18640 transitions. [2024-11-14 04:55:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 04:55:43,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:43,821 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:55:43,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:44,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:44,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:44,222 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:44,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1551224827, now seen corresponding path program 1 times [2024-11-14 04:55:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231391514] [2024-11-14 04:55:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:44,222 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 04:55:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:44,224 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:44,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:44,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:55:44,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:55:44,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:55:45,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:45,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231391514] [2024-11-14 04:55:45,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231391514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:45,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340077100] [2024-11-14 04:55:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:45,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:55:45,208 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:55:45,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-14 04:55:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:45,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:55:45,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:55:45,418 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:55:45,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [340077100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:45,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:55:45,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2024-11-14 04:55:45,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416847790] [2024-11-14 04:55:45,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:45,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:55:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:55:45,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:55:45,420 INFO L87 Difference]: Start difference. First operand 15508 states and 18640 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 04:55:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:45,749 INFO L93 Difference]: Finished difference Result 21480 states and 25715 transitions. [2024-11-14 04:55:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:55:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 108 [2024-11-14 04:55:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:45,767 INFO L225 Difference]: With dead ends: 21480 [2024-11-14 04:55:45,767 INFO L226 Difference]: Without dead ends: 13128 [2024-11-14 04:55:45,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:55:45,775 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 35 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:45,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 208 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:55:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2024-11-14 04:55:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 12179. [2024-11-14 04:55:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12179 states, 12178 states have (on average 1.1822138282148136) internal successors, (14397), 12178 states have internal predecessors, (14397), 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 04:55:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12179 states to 12179 states and 14397 transitions. [2024-11-14 04:55:46,234 INFO L78 Accepts]: Start accepts. Automaton has 12179 states and 14397 transitions. Word has length 108 [2024-11-14 04:55:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:46,234 INFO L471 AbstractCegarLoop]: Abstraction has 12179 states and 14397 transitions. [2024-11-14 04:55:46,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 04:55:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 12179 states and 14397 transitions. [2024-11-14 04:55:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 04:55:46,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:46,239 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2024-11-14 04:55:46,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:46,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:46,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:46,640 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:46,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash -984341648, now seen corresponding path program 1 times [2024-11-14 04:55:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:46,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718709114] [2024-11-14 04:55:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:46,641 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 04:55:46,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:46,643 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:46,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:46,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:55:46,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:55:47,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:55:47,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718709114] [2024-11-14 04:55:47,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718709114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:47,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674614805] [2024-11-14 04:55:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:47,709 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:47,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:55:47,713 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:55:47,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-14 04:55:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:47,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:55:47,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:55:47,994 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:55:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1674614805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:55:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2024-11-14 04:55:47,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493900811] [2024-11-14 04:55:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:47,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:55:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:55:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:55:47,996 INFO L87 Difference]: Start difference. First operand 12179 states and 14397 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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 04:55:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:48,265 INFO L93 Difference]: Finished difference Result 15029 states and 17714 transitions. [2024-11-14 04:55:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:55:48,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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 109 [2024-11-14 04:55:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:48,275 INFO L225 Difference]: With dead ends: 15029 [2024-11-14 04:55:48,275 INFO L226 Difference]: Without dead ends: 9627 [2024-11-14 04:55:48,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:55:48,280 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 35 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:48,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 193 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:55:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2024-11-14 04:55:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 8190. [2024-11-14 04:55:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8190 states, 8189 states have (on average 1.156795701550861) internal successors, (9473), 8189 states have internal predecessors, (9473), 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 04:55:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8190 states to 8190 states and 9473 transitions. [2024-11-14 04:55:48,623 INFO L78 Accepts]: Start accepts. Automaton has 8190 states and 9473 transitions. Word has length 109 [2024-11-14 04:55:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:48,623 INFO L471 AbstractCegarLoop]: Abstraction has 8190 states and 9473 transitions. [2024-11-14 04:55:48,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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 04:55:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8190 states and 9473 transitions. [2024-11-14 04:55:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 04:55:48,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:48,626 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2024-11-14 04:55:48,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:48,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:49,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:49,027 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:49,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1243718615, now seen corresponding path program 1 times [2024-11-14 04:55:49,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:49,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399310292] [2024-11-14 04:55:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:49,027 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 04:55:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:49,029 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:49,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:55:49,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 04:55:49,214 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:55:49,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:49,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399310292] [2024-11-14 04:55:49,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399310292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:49,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:55:49,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:55:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832192339] [2024-11-14 04:55:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:49,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:55:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:55:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:55:49,216 INFO L87 Difference]: Start difference. First operand 8190 states and 9473 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 04:55:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:49,399 INFO L93 Difference]: Finished difference Result 11699 states and 13474 transitions. [2024-11-14 04:55:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:55:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 110 [2024-11-14 04:55:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:49,405 INFO L225 Difference]: With dead ends: 11699 [2024-11-14 04:55:49,405 INFO L226 Difference]: Without dead ends: 6583 [2024-11-14 04:55:49,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:55:49,408 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 27 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:49,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 174 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:55:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2024-11-14 04:55:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6581. [2024-11-14 04:55:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6580 states have (on average 1.139209726443769) internal successors, (7496), 6580 states have internal predecessors, (7496), 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 04:55:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 7496 transitions. [2024-11-14 04:55:49,656 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 7496 transitions. Word has length 110 [2024-11-14 04:55:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:49,657 INFO L471 AbstractCegarLoop]: Abstraction has 6581 states and 7496 transitions. [2024-11-14 04:55:49,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 04:55:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 7496 transitions. [2024-11-14 04:55:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 04:55:49,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:49,660 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:55:49,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:49,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:49,861 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:49,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1263786313, now seen corresponding path program 1 times [2024-11-14 04:55:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:55:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569983987] [2024-11-14 04:55:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:49,862 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 04:55:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:55:49,863 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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 04:55:49,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/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)] Waiting until timeout for monitored process [2024-11-14 04:55:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:49,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:55:49,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:55:51,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:55:52,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:55:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569983987] [2024-11-14 04:55:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569983987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55012763] [2024-11-14 04:55:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:55:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:55:52,143 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:55:52,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-14 04:55:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:52,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:55:52,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 26 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:55:53,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 26 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:55:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55012763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231764467] [2024-11-14 04:55:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:54,176 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:54,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e89aed-cb53-4e6b-8879-45a36d24de14/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 04:55:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:54,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:55:54,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:55:57,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:55:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231764467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:59,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 04:55:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 8, 8, 16, 15] total 65 [2024-11-14 04:55:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871879640] [2024-11-14 04:55:59,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 04:55:59,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 04:55:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:55:59,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 04:55:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3894, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 04:55:59,173 INFO L87 Difference]: Start difference. First operand 6581 states and 7496 transitions. Second operand has 65 states, 65 states have (on average 8.953846153846154) internal successors, (582), 65 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)