./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje --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 9cf0abd1bd1b4ed3cb492af2ceaa5e063719310ace8aba62ab225fe204180938 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:37:26,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:37:26,153 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:37:26,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:37:26,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:37:26,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:37:26,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:37:26,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:37:26,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:37:26,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:37:26,197 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:37:26,197 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:37:26,198 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:37:26,199 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:37:26,200 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:37:26,200 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:37:26,201 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:37:26,202 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:37:26,202 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:37:26,203 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:37:26,204 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:37:26,209 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:37:26,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:37:26,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:37:26,211 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:37:26,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:37:26,212 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:37:26,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:37:26,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:37:26,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:37:26,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:37:26,214 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:37:26,215 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:37:26,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:37:26,216 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:37:26,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:37:26,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:37:26,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:37:26,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:37:26,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:37:26,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:37:26,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:37:26,220 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:37:26,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:37:26,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:37:26,221 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:37:26,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:37:26,222 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cf0abd1bd1b4ed3cb492af2ceaa5e063719310ace8aba62ab225fe204180938 [2024-11-09 04:37:26,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:37:26,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:37:26,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:37:26,615 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:37:26,615 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:37:26,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c Unable to find full path for "g++" [2024-11-09 04:37:29,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:37:29,447 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:37:29,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2024-11-09 04:37:29,458 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/data/1e607cb77/99906672cf394c7890d3015a3be4402c/FLAGd43e5b301 [2024-11-09 04:37:29,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/data/1e607cb77/99906672cf394c7890d3015a3be4402c [2024-11-09 04:37:29,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:37:29,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:37:29,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:37:29,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:37:29,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:37:29,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:37:29" (1/1) ... [2024-11-09 04:37:29,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9698dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:29, skipping insertion in model container [2024-11-09 04:37:29,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:37:29" (1/1) ... [2024-11-09 04:37:29,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:37:30,130 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_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2024-11-09 04:37:30,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:37:30,176 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:37:30,195 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_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2024-11-09 04:37:30,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:37:30,228 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:37:30,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30 WrapperNode [2024-11-09 04:37:30,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:37:30,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:37:30,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:37:30,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:37:30,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,278 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2024-11-09 04:37:30,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:37:30,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:37:30,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:37:30,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:37:30,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:37:30,317 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:37:30,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:37:30,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:37:30,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (1/1) ... [2024-11-09 04:37:30,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:37:30,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:30,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:37:30,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:37:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:37:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:37:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:37:30,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:37:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 04:37:30,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 04:37:30,513 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:37:30,516 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:37:30,767 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 04:37:30,767 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:37:30,828 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:37:30,828 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:37:30,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:37:30 BoogieIcfgContainer [2024-11-09 04:37:30,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:37:30,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:37:30,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:37:30,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:37:30,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:37:29" (1/3) ... [2024-11-09 04:37:30,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caa99ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:37:30, skipping insertion in model container [2024-11-09 04:37:30,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:37:30" (2/3) ... [2024-11-09 04:37:30,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caa99ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:37:30, skipping insertion in model container [2024-11-09 04:37:30,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:37:30" (3/3) ... [2024-11-09 04:37:30,844 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.c [2024-11-09 04:37:30,869 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:37:30,870 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:37:30,974 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:37:30,986 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;@2cd67823, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:37:30,986 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:37:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 04:37:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:37:31,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:31,005 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:37:31,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:31,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -868111449, now seen corresponding path program 1 times [2024-11-09 04:37:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175114569] [2024-11-09 04:37:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:31,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175114569] [2024-11-09 04:37:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175114569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:37:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272585349] [2024-11-09 04:37:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:31,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:37:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:37:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:37:31,330 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:31,369 INFO L93 Difference]: Finished difference Result 47 states and 78 transitions. [2024-11-09 04:37:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:37:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:37:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:31,392 INFO L225 Difference]: With dead ends: 47 [2024-11-09 04:37:31,393 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 04:37:31,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:37:31,405 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:31,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:37:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 04:37:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 04:37:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:37:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2024-11-09 04:37:31,461 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 6 [2024-11-09 04:37:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:31,462 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2024-11-09 04:37:31,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2024-11-09 04:37:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:37:31,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:31,465 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:31,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:37:31,465 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:31,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2035614532, now seen corresponding path program 1 times [2024-11-09 04:37:31,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250679943] [2024-11-09 04:37:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:31,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:31,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250679943] [2024-11-09 04:37:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250679943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:31,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:37:31,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510606679] [2024-11-09 04:37:31,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:31,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:37:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:37:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:37:31,633 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:31,667 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-09 04:37:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:37:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:37:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:31,670 INFO L225 Difference]: With dead ends: 31 [2024-11-09 04:37:31,670 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 04:37:31,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:37:31,673 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:31,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:37:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 04:37:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 04:37:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:37:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2024-11-09 04:37:31,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 7 [2024-11-09 04:37:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:31,690 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2024-11-09 04:37:31,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2024-11-09 04:37:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:37:31,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:31,692 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:31,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:37:31,693 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:31,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2037104082, now seen corresponding path program 1 times [2024-11-09 04:37:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994067673] [2024-11-09 04:37:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:37:31,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206352202] [2024-11-09 04:37:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:31,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:31,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:37:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:31,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:31,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:32,039 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:32,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:32,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994067673] [2024-11-09 04:37:32,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:37:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206352202] [2024-11-09 04:37:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206352202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:32,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:37:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064118645] [2024-11-09 04:37:32,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:32,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:37:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:37:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:37:32,045 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:32,157 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-11-09 04:37:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:37:32,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:37:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:32,159 INFO L225 Difference]: With dead ends: 34 [2024-11-09 04:37:32,160 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 04:37:32,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:32,165 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:32,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 04:37:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-09 04:37:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 04:37:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-09 04:37:32,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 7 [2024-11-09 04:37:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:32,197 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-09 04:37:32,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-09 04:37:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 04:37:32,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:32,199 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:32,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:37:32,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:32,401 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:32,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1330610680, now seen corresponding path program 1 times [2024-11-09 04:37:32,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:32,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546133595] [2024-11-09 04:37:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:32,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:37:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267824223] [2024-11-09 04:37:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:32,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:32,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:37:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:32,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:32,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:32,641 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:32,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546133595] [2024-11-09 04:37:32,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:37:32,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267824223] [2024-11-09 04:37:32,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267824223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:32,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:37:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176280344] [2024-11-09 04:37:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:32,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:37:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:37:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:37:32,649 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:37:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:32,783 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-09 04:37:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:37:32,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-09 04:37:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:32,785 INFO L225 Difference]: With dead ends: 47 [2024-11-09 04:37:32,786 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 04:37:32,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:32,788 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:32,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 04:37:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-09 04:37:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 04:37:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2024-11-09 04:37:32,804 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 12 [2024-11-09 04:37:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:32,806 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2024-11-09 04:37:32,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:37:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2024-11-09 04:37:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:37:32,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:32,810 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:32,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:37:33,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:33,011 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:33,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 698864434, now seen corresponding path program 1 times [2024-11-09 04:37:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492930387] [2024-11-09 04:37:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:37:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052334287] [2024-11-09 04:37:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:33,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:33,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:37:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:33,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:33,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:37:33,224 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:33,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492930387] [2024-11-09 04:37:33,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:37:33,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052334287] [2024-11-09 04:37:33,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052334287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:33,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:33,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:37:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800775811] [2024-11-09 04:37:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:33,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:37:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:37:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:37:33,230 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:33,367 INFO L93 Difference]: Finished difference Result 72 states and 102 transitions. [2024-11-09 04:37:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:37:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-09 04:37:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:33,370 INFO L225 Difference]: With dead ends: 72 [2024-11-09 04:37:33,370 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 04:37:33,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:33,372 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:33,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 04:37:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-09 04:37:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 04:37:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 89 transitions. [2024-11-09 04:37:33,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 89 transitions. Word has length 20 [2024-11-09 04:37:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:33,394 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 89 transitions. [2024-11-09 04:37:33,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 89 transitions. [2024-11-09 04:37:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 04:37:33,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:33,396 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:33,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:37:33,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:33,601 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:33,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1848239713, now seen corresponding path program 1 times [2024-11-09 04:37:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:33,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149096922] [2024-11-09 04:37:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:37:33,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:33,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149096922] [2024-11-09 04:37:33,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149096922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:33,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:37:33,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862736591] [2024-11-09 04:37:33,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:33,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:33,924 INFO L87 Difference]: Start difference. First operand 63 states and 89 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:34,020 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-11-09 04:37:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-09 04:37:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:34,033 INFO L225 Difference]: With dead ends: 102 [2024-11-09 04:37:34,033 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 04:37:34,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:34,035 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:34,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 121 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 04:37:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-09 04:37:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 04:37:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2024-11-09 04:37:34,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 23 [2024-11-09 04:37:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:34,061 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2024-11-09 04:37:34,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2024-11-09 04:37:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 04:37:34,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:34,063 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:34,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:37:34,063 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:34,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1295969102, now seen corresponding path program 1 times [2024-11-09 04:37:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:34,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163121377] [2024-11-09 04:37:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:37:34,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:34,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163121377] [2024-11-09 04:37:34,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163121377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:34,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:34,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:37:34,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175941615] [2024-11-09 04:37:34,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:34,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:34,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:34,289 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:37:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:34,410 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2024-11-09 04:37:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-09 04:37:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:34,413 INFO L225 Difference]: With dead ends: 73 [2024-11-09 04:37:34,413 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 04:37:34,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:37:34,415 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:34,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 04:37:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-09 04:37:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 04:37:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-09 04:37:34,437 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 30 [2024-11-09 04:37:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:34,438 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-09 04:37:34,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:37:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-09 04:37:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 04:37:34,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:34,440 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:34,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:37:34,440 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:34,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash 947234108, now seen corresponding path program 1 times [2024-11-09 04:37:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830151748] [2024-11-09 04:37:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:34,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:37:34,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830151748] [2024-11-09 04:37:34,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830151748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968624290] [2024-11-09 04:37:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:34,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:34,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:34,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:37:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:34,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:34,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:37:35,113 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:35,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968624290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:35,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:37:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-09 04:37:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608261845] [2024-11-09 04:37:35,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:35,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:37:35,116 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:37:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:35,305 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2024-11-09 04:37:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-09 04:37:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:35,310 INFO L225 Difference]: With dead ends: 84 [2024-11-09 04:37:35,311 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 04:37:35,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:37:35,316 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:35,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:37:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 04:37:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-11-09 04:37:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 04:37:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2024-11-09 04:37:35,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 36 [2024-11-09 04:37:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:35,356 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2024-11-09 04:37:35,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:37:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2024-11-09 04:37:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:37:35,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:35,362 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:35,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:37:35,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:35,563 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:35,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -229507951, now seen corresponding path program 1 times [2024-11-09 04:37:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:35,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475548277] [2024-11-09 04:37:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:37:35,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:35,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475548277] [2024-11-09 04:37:35,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475548277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:35,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636602052] [2024-11-09 04:37:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:35,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:35,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:37:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:35,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:35,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:37:35,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:37:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636602052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:36,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940113318] [2024-11-09 04:37:36,185 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 04:37:36,185 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:36,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:36,199 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:36,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:43,565 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2024-11-09 04:37:43,573 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:46,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1898#(and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:37:46,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:46,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:37:46,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-09 04:37:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597280687] [2024-11-09 04:37:46,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:46,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:37:46,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:37:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:37:46,851 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 04:37:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:47,149 INFO L93 Difference]: Finished difference Result 244 states and 301 transitions. [2024-11-09 04:37:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:37:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 39 [2024-11-09 04:37:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:47,153 INFO L225 Difference]: With dead ends: 244 [2024-11-09 04:37:47,154 INFO L226 Difference]: Without dead ends: 237 [2024-11-09 04:37:47,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:37:47,156 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:47,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 140 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:37:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-09 04:37:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 221. [2024-11-09 04:37:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 150 states have internal predecessors, (170), 55 states have call successors, (55), 24 states have call predecessors, (55), 24 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-09 04:37:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 276 transitions. [2024-11-09 04:37:47,192 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 276 transitions. Word has length 39 [2024-11-09 04:37:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:47,192 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 276 transitions. [2024-11-09 04:37:47,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 04:37:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 276 transitions. [2024-11-09 04:37:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:37:47,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:47,195 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:47,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:47,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:47,395 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:47,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash -548647717, now seen corresponding path program 1 times [2024-11-09 04:37:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660755152] [2024-11-09 04:37:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:37:47,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405298444] [2024-11-09 04:37:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:47,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:47,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:47,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:37:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:47,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:37:47,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:37:47,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:37:48,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660755152] [2024-11-09 04:37:48,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:37:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405298444] [2024-11-09 04:37:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405298444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942654947] [2024-11-09 04:37:48,268 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:37:48,269 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:48,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:48,269 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:48,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:52,638 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2024-11-09 04:37:52,647 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:55,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2908#(and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:37:55,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:55,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:37:55,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-09 04:37:55,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429862780] [2024-11-09 04:37:55,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:55,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:37:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:37:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:37:55,581 INFO L87 Difference]: Start difference. First operand 221 states and 276 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 04:37:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:56,123 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2024-11-09 04:37:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:37:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 44 [2024-11-09 04:37:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:56,127 INFO L225 Difference]: With dead ends: 262 [2024-11-09 04:37:56,127 INFO L226 Difference]: Without dead ends: 256 [2024-11-09 04:37:56,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2024-11-09 04:37:56,129 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:56,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 182 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:37:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-09 04:37:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2024-11-09 04:37:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 165 states have internal predecessors, (182), 55 states have call successors, (55), 31 states have call predecessors, (55), 31 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-09 04:37:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2024-11-09 04:37:56,185 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 44 [2024-11-09 04:37:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:56,186 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2024-11-09 04:37:56,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 04:37:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2024-11-09 04:37:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 04:37:56,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:56,190 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:56,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:37:56,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:37:56,394 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:37:56,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1736423621, now seen corresponding path program 1 times [2024-11-09 04:37:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:56,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190938017] [2024-11-09 04:37:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-09 04:37:56,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:56,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190938017] [2024-11-09 04:37:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190938017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:56,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597730458] [2024-11-09 04:37:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:56,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:56,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:37:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:56,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 04:37:56,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-09 04:37:57,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-09 04:37:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597730458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126964835] [2024-11-09 04:37:57,250 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 04:37:57,250 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:57,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:57,251 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:57,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:38:00,149 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-09 04:38:00,153 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:38:02,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4083#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-09 04:38:02,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:38:02,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:38:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 17 [2024-11-09 04:38:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307717086] [2024-11-09 04:38:02,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:38:02,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:38:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:38:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:38:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:38:02,260 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-09 04:38:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:38:02,836 INFO L93 Difference]: Finished difference Result 262 states and 305 transitions. [2024-11-09 04:38:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:38:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 60 [2024-11-09 04:38:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:38:02,840 INFO L225 Difference]: With dead ends: 262 [2024-11-09 04:38:02,840 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 04:38:02,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:38:02,847 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:38:02,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 156 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:38:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 04:38:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 04:38:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2024-11-09 04:38:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 04:38:02,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2024-11-09 04:38:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:38:02,849 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 04:38:02,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-09 04:38:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 04:38:02,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 04:38:02,854 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 04:38:02,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:38:03,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:38:03,062 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:38:03,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 04:38:04,965 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:38:04,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:38:04 BoogieIcfgContainer [2024-11-09 04:38:04,998 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:38:04,999 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:38:04,999 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:38:04,999 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:38:05,000 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:37:30" (3/4) ... [2024-11-09 04:38:05,003 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 04:38:05,009 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-09 04:38:05,016 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-11-09 04:38:05,017 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-09 04:38:05,017 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 04:38:05,018 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 04:38:05,146 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 04:38:05,146 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 04:38:05,146 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:38:05,147 INFO L158 Benchmark]: Toolchain (without parser) took 35325.05ms. Allocated memory was 142.6MB in the beginning and 587.2MB in the end (delta: 444.6MB). Free memory was 101.0MB in the beginning and 244.8MB in the end (delta: -143.8MB). Peak memory consumption was 303.3MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,147 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:38:05,148 INFO L158 Benchmark]: CACSL2BoogieTranslator took 405.89ms. Allocated memory is still 142.6MB. Free memory was 101.0MB in the beginning and 88.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,148 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.99ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:38:05,148 INFO L158 Benchmark]: Boogie Preprocessor took 36.46ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 85.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,149 INFO L158 Benchmark]: RCFGBuilder took 512.74ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 72.1MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,149 INFO L158 Benchmark]: TraceAbstraction took 34164.66ms. Allocated memory was 142.6MB in the beginning and 587.2MB in the end (delta: 444.6MB). Free memory was 71.3MB in the beginning and 249.0MB in the end (delta: -177.7MB). Peak memory consumption was 267.7MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,150 INFO L158 Benchmark]: Witness Printer took 147.85ms. Allocated memory is still 587.2MB. Free memory was 249.0MB in the beginning and 244.8MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 04:38:05,151 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 405.89ms. Allocated memory is still 142.6MB. Free memory was 101.0MB in the beginning and 88.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.99ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.46ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 85.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 512.74ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 72.1MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 34164.66ms. Allocated memory was 142.6MB in the beginning and 587.2MB in the end (delta: 444.6MB). Free memory was 71.3MB in the beginning and 249.0MB in the end (delta: -177.7MB). Peak memory consumption was 267.7MB. Max. memory is 16.1GB. * Witness Printer took 147.85ms. Allocated memory is still 587.2MB. Free memory was 249.0MB in the beginning and 244.8MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.1s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 274 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 258 mSDsluCounter, 1231 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 932 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 745 IncrementalHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 299 mSDtfsCounter, 745 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 558 GetRequests, 426 SyntacticMatches, 9 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=245occurred in iteration=10, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 502 NumberOfCodeBlocks, 502 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 545 ConstructedInterpolants, 0 QuantifiedInterpolants, 1601 SizeOfPredicates, 13 NumberOfNonLiveVariables, 684 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 886/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: ((1 <= cond) && (counter == \old(counter))) RESULT: Ultimate proved your program to be correct! [2024-11-09 04:38:05,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbbc06c6-e566-4bee-8137-b863bbc7cfe1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE