./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:49:41,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:49:41,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:49:41,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:49:41,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:49:41,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:49:41,197 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:49:41,198 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:49:41,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:49:41,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:49:41,198 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:49:41,199 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:49:41,199 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:49:41,199 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:49:41,199 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:49:41,199 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:49:41,199 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:49:41,200 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:49:41,200 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:49:41,200 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:49:41,200 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:49:41,200 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:49:41,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:49:41,201 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:49:41,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:49:41,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:49:41,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:49:41,203 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:49:41,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:49:41,203 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab [2024-11-13 23:49:41,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:49:41,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:49:41,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:49:41,581 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:49:41,581 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:49:41,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-13 23:49:43,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:49:43,982 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:49:43,986 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2024-11-13 23:49:44,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/data/257056437/823b2ab52a4d46ceaabee30012228afe/FLAGb5ccc0401 [2024-11-13 23:49:44,027 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/data/257056437/823b2ab52a4d46ceaabee30012228afe [2024-11-13 23:49:44,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:49:44,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:49:44,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:44,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:49:44,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:49:44,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb46f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44, skipping insertion in model container [2024-11-13 23:49:44,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:49:44,424 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_e62a82fe-32cf-40d5-b303-e547463a1d42/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2024-11-13 23:49:44,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:44,494 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:49:44,589 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_e62a82fe-32cf-40d5-b303-e547463a1d42/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2024-11-13 23:49:44,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:44,644 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:49:44,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44 WrapperNode [2024-11-13 23:49:44,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:44,647 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:44,647 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:49:44,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:49:44,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,667 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,712 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 615 [2024-11-13 23:49:44,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:44,713 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:49:44,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:49:44,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:49:44,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:49:44,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:49:44,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:49:44,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:49:44,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (1/1) ... [2024-11-13 23:49:44,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:49:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:44,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:49:44,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:49:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:49:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:49:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:49:44,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:49:45,070 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:49:45,073 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:49:45,898 INFO L? ?]: Removed 42 outVars from TransFormulas that were not future-live. [2024-11-13 23:49:45,898 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:49:46,229 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:49:46,230 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 23:49:46,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:46 BoogieIcfgContainer [2024-11-13 23:49:46,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:49:46,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:49:46,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:49:46,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:49:46,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:49:44" (1/3) ... [2024-11-13 23:49:46,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31416c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:46, skipping insertion in model container [2024-11-13 23:49:46,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:44" (2/3) ... [2024-11-13 23:49:46,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31416c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:46, skipping insertion in model container [2024-11-13 23:49:46,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:46" (3/3) ... [2024-11-13 23:49:46,277 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2024-11-13 23:49:46,296 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:49:46,297 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c that has 1 procedures, 81 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-13 23:49:46,376 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:49:46,392 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;@46494429, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:49:46,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:49:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 80 states have internal predecessors, (138), 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) [2024-11-13 23:49:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 23:49:46,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:46,406 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:46,407 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:46,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 146484967, now seen corresponding path program 1 times [2024-11-13 23:49:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:46,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318401068] [2024-11-13 23:49:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:46,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318401068] [2024-11-13 23:49:46,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318401068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:46,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281497758] [2024-11-13 23:49:46,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:46,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:46,983 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 80 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-11-13 23:49:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:47,131 INFO L93 Difference]: Finished difference Result 185 states and 305 transitions. [2024-11-13 23:49:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 23:49:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:47,147 INFO L225 Difference]: With dead ends: 185 [2024-11-13 23:49:47,149 INFO L226 Difference]: Without dead ends: 123 [2024-11-13 23:49:47,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,158 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 92 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:47,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-13 23:49:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-11-13 23:49:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 120 states have internal predecessors, (182), 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) [2024-11-13 23:49:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 182 transitions. [2024-11-13 23:49:47,198 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 182 transitions. Word has length 32 [2024-11-13 23:49:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:47,198 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 182 transitions. [2024-11-13 23:49:47,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-11-13 23:49:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 182 transitions. [2024-11-13 23:49:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 23:49:47,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:47,201 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:47,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:49:47,203 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:47,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -782094641, now seen corresponding path program 1 times [2024-11-13 23:49:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248699347] [2024-11-13 23:49:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:47,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248699347] [2024-11-13 23:49:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248699347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782729424] [2024-11-13 23:49:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:47,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,476 INFO L87 Difference]: Start difference. First operand 121 states and 182 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-11-13 23:49:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:47,569 INFO L93 Difference]: Finished difference Result 276 states and 431 transitions. [2024-11-13 23:49:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:47,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-13 23:49:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:47,571 INFO L225 Difference]: With dead ends: 276 [2024-11-13 23:49:47,571 INFO L226 Difference]: Without dead ends: 178 [2024-11-13 23:49:47,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,572 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 81 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:47,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-13 23:49:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2024-11-13 23:49:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 175 states have internal predecessors, (267), 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) [2024-11-13 23:49:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 267 transitions. [2024-11-13 23:49:47,585 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 267 transitions. Word has length 34 [2024-11-13 23:49:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:47,585 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 267 transitions. [2024-11-13 23:49:47,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-11-13 23:49:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 267 transitions. [2024-11-13 23:49:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 23:49:47,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:47,586 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:47,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:49:47,587 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:47,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1113341436, now seen corresponding path program 1 times [2024-11-13 23:49:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957012449] [2024-11-13 23:49:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:47,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957012449] [2024-11-13 23:49:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957012449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495524744] [2024-11-13 23:49:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:47,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:47,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,730 INFO L87 Difference]: Start difference. First operand 176 states and 267 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-13 23:49:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:47,806 INFO L93 Difference]: Finished difference Result 442 states and 694 transitions. [2024-11-13 23:49:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 23:49:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:47,809 INFO L225 Difference]: With dead ends: 442 [2024-11-13 23:49:47,809 INFO L226 Difference]: Without dead ends: 291 [2024-11-13 23:49:47,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,810 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 82 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:47,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 232 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-11-13 23:49:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2024-11-13 23:49:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 288 states have internal predecessors, (448), 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) [2024-11-13 23:49:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 448 transitions. [2024-11-13 23:49:47,832 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 448 transitions. Word has length 36 [2024-11-13 23:49:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:47,832 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 448 transitions. [2024-11-13 23:49:47,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-13 23:49:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 448 transitions. [2024-11-13 23:49:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 23:49:47,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:47,834 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:47,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:49:47,835 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:47,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1418842763, now seen corresponding path program 1 times [2024-11-13 23:49:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173247357] [2024-11-13 23:49:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:47,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173247357] [2024-11-13 23:49:47,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173247357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:47,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:47,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880412047] [2024-11-13 23:49:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:47,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:47,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:47,995 INFO L87 Difference]: Start difference. First operand 289 states and 448 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2024-11-13 23:49:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:48,049 INFO L93 Difference]: Finished difference Result 717 states and 1132 transitions. [2024-11-13 23:49:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-13 23:49:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:48,055 INFO L225 Difference]: With dead ends: 717 [2024-11-13 23:49:48,055 INFO L226 Difference]: Without dead ends: 453 [2024-11-13 23:49:48,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:48,060 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 81 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:48,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 204 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:49:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-13 23:49:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2024-11-13 23:49:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5666666666666667) internal successors, (705), 450 states have internal predecessors, (705), 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) [2024-11-13 23:49:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 705 transitions. [2024-11-13 23:49:48,084 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 705 transitions. Word has length 38 [2024-11-13 23:49:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:48,084 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 705 transitions. [2024-11-13 23:49:48,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2024-11-13 23:49:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 705 transitions. [2024-11-13 23:49:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:49:48,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:48,086 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:48,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:49:48,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:48,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:48,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1642069826, now seen corresponding path program 1 times [2024-11-13 23:49:48,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:48,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632858461] [2024-11-13 23:49:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:48,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632858461] [2024-11-13 23:49:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632858461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:48,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:48,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:48,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602844660] [2024-11-13 23:49:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:48,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:48,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:48,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:48,223 INFO L87 Difference]: Start difference. First operand 451 states and 705 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-13 23:49:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:48,311 INFO L93 Difference]: Finished difference Result 1169 states and 1856 transitions. [2024-11-13 23:49:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:48,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:49:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:48,319 INFO L225 Difference]: With dead ends: 1169 [2024-11-13 23:49:48,319 INFO L226 Difference]: Without dead ends: 756 [2024-11-13 23:49:48,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:48,321 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 77 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:48,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 213 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2024-11-13 23:49:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 754. [2024-11-13 23:49:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.5737051792828685) internal successors, (1185), 753 states have internal predecessors, (1185), 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) [2024-11-13 23:49:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1185 transitions. [2024-11-13 23:49:48,378 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1185 transitions. Word has length 40 [2024-11-13 23:49:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:48,379 INFO L471 AbstractCegarLoop]: Abstraction has 754 states and 1185 transitions. [2024-11-13 23:49:48,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-13 23:49:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1185 transitions. [2024-11-13 23:49:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 23:49:48,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:48,380 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:48,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 23:49:48,381 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:48,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1502205127, now seen corresponding path program 1 times [2024-11-13 23:49:48,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:48,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209565995] [2024-11-13 23:49:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:48,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:48,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209565995] [2024-11-13 23:49:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209565995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:48,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:48,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:49:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364976728] [2024-11-13 23:49:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:48,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:48,540 INFO L87 Difference]: Start difference. First operand 754 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:48,615 INFO L93 Difference]: Finished difference Result 1896 states and 3006 transitions. [2024-11-13 23:49:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-13 23:49:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:48,624 INFO L225 Difference]: With dead ends: 1896 [2024-11-13 23:49:48,625 INFO L226 Difference]: Without dead ends: 1180 [2024-11-13 23:49:48,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:48,627 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:48,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 206 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2024-11-13 23:49:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1178. [2024-11-13 23:49:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.5760407816482582) internal successors, (1855), 1177 states have internal predecessors, (1855), 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) [2024-11-13 23:49:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1855 transitions. [2024-11-13 23:49:48,681 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1855 transitions. Word has length 42 [2024-11-13 23:49:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:48,681 INFO L471 AbstractCegarLoop]: Abstraction has 1178 states and 1855 transitions. [2024-11-13 23:49:48,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1855 transitions. [2024-11-13 23:49:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 23:49:48,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:48,683 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:48,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 23:49:48,683 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:48,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash -200687194, now seen corresponding path program 1 times [2024-11-13 23:49:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753981958] [2024-11-13 23:49:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:48,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753981958] [2024-11-13 23:49:48,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753981958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:48,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:48,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:49:48,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624382132] [2024-11-13 23:49:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:48,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:48,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:48,927 INFO L87 Difference]: Start difference. First operand 1178 states and 1855 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:49,288 INFO L93 Difference]: Finished difference Result 3006 states and 4744 transitions. [2024-11-13 23:49:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:49:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-13 23:49:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:49,298 INFO L225 Difference]: With dead ends: 3006 [2024-11-13 23:49:49,298 INFO L226 Difference]: Without dead ends: 1879 [2024-11-13 23:49:49,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:49:49,302 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 463 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:49,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 792 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:49:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2024-11-13 23:49:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1869. [2024-11-13 23:49:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5637044967880085) internal successors, (2921), 1868 states have internal predecessors, (2921), 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) [2024-11-13 23:49:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2921 transitions. [2024-11-13 23:49:49,403 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2921 transitions. Word has length 44 [2024-11-13 23:49:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:49,403 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2921 transitions. [2024-11-13 23:49:49,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2921 transitions. [2024-11-13 23:49:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 23:49:49,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:49,404 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:49,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 23:49:49,405 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:49,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1988839936, now seen corresponding path program 1 times [2024-11-13 23:49:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451156552] [2024-11-13 23:49:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:49,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:49,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451156552] [2024-11-13 23:49:49,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451156552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:49,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:49,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541471743] [2024-11-13 23:49:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:49,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:49,547 INFO L87 Difference]: Start difference. First operand 1869 states and 2921 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-11-13 23:49:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:49,674 INFO L93 Difference]: Finished difference Result 3689 states and 5780 transitions. [2024-11-13 23:49:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-13 23:49:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:49,683 INFO L225 Difference]: With dead ends: 3689 [2024-11-13 23:49:49,683 INFO L226 Difference]: Without dead ends: 1871 [2024-11-13 23:49:49,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:49,686 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 153 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:49,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 284 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2024-11-13 23:49:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2024-11-13 23:49:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5572805139186296) internal successors, (2909), 1868 states have internal predecessors, (2909), 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) [2024-11-13 23:49:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2909 transitions. [2024-11-13 23:49:49,751 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2909 transitions. Word has length 45 [2024-11-13 23:49:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:49,752 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2909 transitions. [2024-11-13 23:49:49,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-11-13 23:49:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2909 transitions. [2024-11-13 23:49:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 23:49:49,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:49,753 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:49,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 23:49:49,754 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:49,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1582442067, now seen corresponding path program 1 times [2024-11-13 23:49:49,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:49,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094308845] [2024-11-13 23:49:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:49,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:49,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:49,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094308845] [2024-11-13 23:49:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094308845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:49,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:49,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828663524] [2024-11-13 23:49:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:49,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:49,951 INFO L87 Difference]: Start difference. First operand 1869 states and 2909 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-13 23:49:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:50,090 INFO L93 Difference]: Finished difference Result 3689 states and 5756 transitions. [2024-11-13 23:49:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-13 23:49:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:50,100 INFO L225 Difference]: With dead ends: 3689 [2024-11-13 23:49:50,101 INFO L226 Difference]: Without dead ends: 1871 [2024-11-13 23:49:50,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:50,106 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 161 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:50,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 290 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2024-11-13 23:49:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2024-11-13 23:49:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5508565310492506) internal successors, (2897), 1868 states have internal predecessors, (2897), 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) [2024-11-13 23:49:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2897 transitions. [2024-11-13 23:49:50,162 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2897 transitions. Word has length 46 [2024-11-13 23:49:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:50,162 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2897 transitions. [2024-11-13 23:49:50,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-13 23:49:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2897 transitions. [2024-11-13 23:49:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 23:49:50,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:50,163 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:50,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 23:49:50,164 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:50,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1864451993, now seen corresponding path program 1 times [2024-11-13 23:49:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:50,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676542582] [2024-11-13 23:49:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:50,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:50,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:50,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676542582] [2024-11-13 23:49:50,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676542582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:50,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:50,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353514497] [2024-11-13 23:49:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:50,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:50,353 INFO L87 Difference]: Start difference. First operand 1869 states and 2897 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-13 23:49:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:50,486 INFO L93 Difference]: Finished difference Result 3689 states and 5732 transitions. [2024-11-13 23:49:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 23:49:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:50,494 INFO L225 Difference]: With dead ends: 3689 [2024-11-13 23:49:50,494 INFO L226 Difference]: Without dead ends: 1871 [2024-11-13 23:49:50,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:50,497 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 159 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:50,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 293 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2024-11-13 23:49:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2024-11-13 23:49:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5444325481798715) internal successors, (2885), 1868 states have internal predecessors, (2885), 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) [2024-11-13 23:49:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2885 transitions. [2024-11-13 23:49:50,551 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2885 transitions. Word has length 47 [2024-11-13 23:49:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:50,551 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2885 transitions. [2024-11-13 23:49:50,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-13 23:49:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2885 transitions. [2024-11-13 23:49:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:49:50,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:50,552 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:50,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 23:49:50,553 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:50,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2040652216, now seen corresponding path program 1 times [2024-11-13 23:49:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440103135] [2024-11-13 23:49:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:50,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:50,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440103135] [2024-11-13 23:49:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440103135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:49:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830150063] [2024-11-13 23:49:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:50,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:50,920 INFO L87 Difference]: Start difference. First operand 1869 states and 2885 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2024-11-13 23:49:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:51,131 INFO L93 Difference]: Finished difference Result 3689 states and 5708 transitions. [2024-11-13 23:49:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:49:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-13 23:49:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:51,139 INFO L225 Difference]: With dead ends: 3689 [2024-11-13 23:49:51,140 INFO L226 Difference]: Without dead ends: 1871 [2024-11-13 23:49:51,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:49:51,144 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 63 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:51,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 365 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2024-11-13 23:49:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2024-11-13 23:49:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5401498929336188) internal successors, (2877), 1868 states have internal predecessors, (2877), 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) [2024-11-13 23:49:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2877 transitions. [2024-11-13 23:49:51,196 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2877 transitions. Word has length 49 [2024-11-13 23:49:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:51,197 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2877 transitions. [2024-11-13 23:49:51,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2024-11-13 23:49:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2877 transitions. [2024-11-13 23:49:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 23:49:51,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:51,198 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:51,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 23:49:51,198 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:51,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 54481247, now seen corresponding path program 1 times [2024-11-13 23:49:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:51,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24984152] [2024-11-13 23:49:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:51,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:51,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24984152] [2024-11-13 23:49:51,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24984152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:51,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:51,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:49:51,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870230374] [2024-11-13 23:49:51,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:51,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:51,534 INFO L87 Difference]: Start difference. First operand 1869 states and 2877 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-13 23:49:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:51,732 INFO L93 Difference]: Finished difference Result 4710 states and 7235 transitions. [2024-11-13 23:49:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:49:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 23:49:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:51,744 INFO L225 Difference]: With dead ends: 4710 [2024-11-13 23:49:51,744 INFO L226 Difference]: Without dead ends: 2892 [2024-11-13 23:49:51,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:49:51,749 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 62 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:51,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 391 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2024-11-13 23:49:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2890. [2024-11-13 23:49:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 1.5257874697127034) internal successors, (4408), 2889 states have internal predecessors, (4408), 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) [2024-11-13 23:49:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4408 transitions. [2024-11-13 23:49:51,829 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4408 transitions. Word has length 52 [2024-11-13 23:49:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:51,829 INFO L471 AbstractCegarLoop]: Abstraction has 2890 states and 4408 transitions. [2024-11-13 23:49:51,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-13 23:49:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4408 transitions. [2024-11-13 23:49:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 23:49:51,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:51,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:51,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 23:49:51,830 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:51,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1698270331, now seen corresponding path program 1 times [2024-11-13 23:49:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205961962] [2024-11-13 23:49:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:51,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:52,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:52,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205961962] [2024-11-13 23:49:52,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205961962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:52,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:52,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 23:49:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961300207] [2024-11-13 23:49:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:52,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:49:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:49:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:49:52,367 INFO L87 Difference]: Start difference. First operand 2890 states and 4408 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-13 23:49:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:52,585 INFO L93 Difference]: Finished difference Result 2900 states and 4419 transitions. [2024-11-13 23:49:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:49:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-13 23:49:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:52,596 INFO L225 Difference]: With dead ends: 2900 [2024-11-13 23:49:52,596 INFO L226 Difference]: Without dead ends: 2898 [2024-11-13 23:49:52,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:49:52,597 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 58 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:52,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 502 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2024-11-13 23:49:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2024-11-13 23:49:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5226252158894646) internal successors, (4408), 2895 states have internal predecessors, (4408), 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) [2024-11-13 23:49:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4408 transitions. [2024-11-13 23:49:52,669 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4408 transitions. Word has length 53 [2024-11-13 23:49:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:52,669 INFO L471 AbstractCegarLoop]: Abstraction has 2896 states and 4408 transitions. [2024-11-13 23:49:52,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-13 23:49:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4408 transitions. [2024-11-13 23:49:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 23:49:52,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:52,670 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:52,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 23:49:52,670 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:52,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:52,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1272300555, now seen corresponding path program 1 times [2024-11-13 23:49:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:52,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262940707] [2024-11-13 23:49:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:49:54,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262940707] [2024-11-13 23:49:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262940707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979783773] [2024-11-13 23:49:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:54,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:54,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:54,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:54,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:49:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:54,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 23:49:54,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:56,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:02,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979783773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:02,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952148715] [2024-11-13 23:50:02,036 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:50:02,037 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:50:02,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:50:02,049 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:50:02,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:50:42,661 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:50:59,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48706#(and (exists ((v_~__return_1887~0_18 Int)) (and (<= 0 v_~__return_1887~0_18) (<= 0 ~mode1~0) (= ~nomsg~0 ~p12_new~0) (<= 2 (+ ~st3~0 ~st2~0 ~st1~0)) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p21_new~0) (= ~nomsg~0 ~p32_new~0) (= ~p23_new~0 ~nomsg~0) (<= ~mode1~0 1) (<= v_~__return_1887~0_18 1) (<= 0 ~mode2~0) (= ~p31_new~0 ~nomsg~0) (= ~nomsg~0 ~p13_new~0))) (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_24| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_1887~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_24|))))' at error location [2024-11-13 23:50:59,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:50:59,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:59,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 32 [2024-11-13 23:50:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565911434] [2024-11-13 23:50:59,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:59,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 23:50:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 23:50:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=5642, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 23:50:59,631 INFO L87 Difference]: Start difference. First operand 2896 states and 4408 transitions. Second operand has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 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) [2024-11-13 23:51:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:08,513 INFO L93 Difference]: Finished difference Result 15906 states and 24538 transitions. [2024-11-13 23:51:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-13 23:51:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-13 23:51:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:08,558 INFO L225 Difference]: With dead ends: 15906 [2024-11-13 23:51:08,558 INFO L226 Difference]: Without dead ends: 13061 [2024-11-13 23:51:08,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7026 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=2376, Invalid=12876, Unknown=0, NotChecked=0, Total=15252 [2024-11-13 23:51:08,567 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 3162 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3162 SdHoareTripleChecker+Valid, 4814 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:08,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3162 Valid, 4814 Invalid, 2215 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 23:51:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13061 states. [2024-11-13 23:51:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13061 to 11403. [2024-11-13 23:51:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11403 states, 11402 states have (on average 1.538940536747939) internal successors, (17547), 11402 states have internal predecessors, (17547), 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) [2024-11-13 23:51:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11403 states to 11403 states and 17547 transitions. [2024-11-13 23:51:08,890 INFO L78 Accepts]: Start accepts. Automaton has 11403 states and 17547 transitions. Word has length 61 [2024-11-13 23:51:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:08,891 INFO L471 AbstractCegarLoop]: Abstraction has 11403 states and 17547 transitions. [2024-11-13 23:51:08,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 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) [2024-11-13 23:51:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11403 states and 17547 transitions. [2024-11-13 23:51:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 23:51:08,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:08,895 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:51:08,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:51:09,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 23:51:09,096 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:09,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 724107323, now seen corresponding path program 1 times [2024-11-13 23:51:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611392433] [2024-11-13 23:51:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:51:09,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611392433] [2024-11-13 23:51:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611392433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:51:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278337264] [2024-11-13 23:51:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:09,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:51:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:51:09,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:51:09,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:51:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:09,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:51:09,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:51:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:51:10,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:51:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:51:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278337264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:51:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423384053] [2024-11-13 23:51:10,230 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:51:10,230 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:51:10,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:51:10,230 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:51:10,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:51:53,072 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:52:07,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76521#(and (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_31| Int) (|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_31|) (= ~__return_1887~0 0))) (exists ((v_~__return_1887~0_24 Int)) (and (<= 0 ~mode1~0) (= ~nomsg~0 ~p12_new~0) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= (+ ~st3~0 ~st2~0 ~st1~0) 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p21_new~0) (= ~nomsg~0 ~p32_new~0) (= ~p23_new~0 ~nomsg~0) (<= ~mode1~0 1) (<= 2 (+ ~nl1~0 ~st1~0)) (<= 0 v_~__return_1887~0_24) (<= 0 ~mode2~0) (= ~p31_new~0 ~nomsg~0) (= ~nomsg~0 ~p13_new~0) (<= v_~__return_1887~0_24 1))))' at error location [2024-11-13 23:52:07,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:52:07,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:52:07,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-13 23:52:07,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769882971] [2024-11-13 23:52:07,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:52:07,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:52:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:52:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:52:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=2568, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:52:07,983 INFO L87 Difference]: Start difference. First operand 11403 states and 17547 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-11-13 23:52:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:52:08,137 INFO L93 Difference]: Finished difference Result 27186 states and 41940 transitions. [2024-11-13 23:52:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:52:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-13 23:52:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:52:08,180 INFO L225 Difference]: With dead ends: 27186 [2024-11-13 23:52:08,180 INFO L226 Difference]: Without dead ends: 16060 [2024-11-13 23:52:08,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=512, Invalid=2568, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:52:08,192 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 418 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:52:08,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 344 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:52:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16060 states. [2024-11-13 23:52:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16060 to 13097. [2024-11-13 23:52:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13097 states, 13096 states have (on average 1.5263439218081858) internal successors, (19989), 13096 states have internal predecessors, (19989), 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) [2024-11-13 23:52:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13097 states to 13097 states and 19989 transitions. [2024-11-13 23:52:08,462 INFO L78 Accepts]: Start accepts. Automaton has 13097 states and 19989 transitions. Word has length 62 [2024-11-13 23:52:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:52:08,462 INFO L471 AbstractCegarLoop]: Abstraction has 13097 states and 19989 transitions. [2024-11-13 23:52:08,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-11-13 23:52:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13097 states and 19989 transitions. [2024-11-13 23:52:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 23:52:08,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:52:08,467 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:52:08,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:52:08,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 23:52:08,671 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:52:08,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:52:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 914544338, now seen corresponding path program 1 times [2024-11-13 23:52:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:52:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595799373] [2024-11-13 23:52:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:52:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:52:08,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:52:08,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595799373] [2024-11-13 23:52:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595799373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:52:08,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159122338] [2024-11-13 23:52:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:08,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:52:09,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:52:09,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:52:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:09,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:52:09,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:52:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:52:09,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:52:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:52:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159122338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:52:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176852485] [2024-11-13 23:52:09,681 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:52:09,681 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:52:09,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:52:09,682 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:52:09,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:52:52,033 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:53:06,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117232#(and (exists ((v_~__return_1887~0_30 Int)) (and (<= (+ ~nl1~0 ~st1~0) 1) (<= 0 ~mode1~0) (= ~nomsg~0 ~p12_new~0) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= (+ ~st3~0 ~st2~0 ~st1~0) 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p21_new~0) (= ~nomsg~0 ~p32_new~0) (= ~p23_new~0 ~nomsg~0) (<= ~mode1~0 1) (<= 2 (+ ~nl2~0 ~st2~0)) (<= 0 ~mode2~0) (= ~p31_new~0 ~nomsg~0) (= ~nomsg~0 ~p13_new~0) (<= v_~__return_1887~0_30 1) (<= 0 v_~__return_1887~0_30))) (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_38| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_38|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_1887~0 0))))' at error location [2024-11-13 23:53:06,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:53:06,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:53:06,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-13 23:53:06,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967704441] [2024-11-13 23:53:06,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:53:06,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:53:06,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:53:06,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:53:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:53:06,824 INFO L87 Difference]: Start difference. First operand 13097 states and 19989 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2024-11-13 23:53:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:53:06,993 INFO L93 Difference]: Finished difference Result 26971 states and 41324 transitions. [2024-11-13 23:53:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:53:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-13 23:53:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:53:07,034 INFO L225 Difference]: With dead ends: 26971 [2024-11-13 23:53:07,034 INFO L226 Difference]: Without dead ends: 19833 [2024-11-13 23:53:07,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:53:07,045 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 266 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:53:07,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 518 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:53:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19833 states. [2024-11-13 23:53:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19833 to 15546. [2024-11-13 23:53:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 1.5212608555805724) internal successors, (23648), 15545 states have internal predecessors, (23648), 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) [2024-11-13 23:53:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 23648 transitions. [2024-11-13 23:53:07,372 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 23648 transitions. Word has length 63 [2024-11-13 23:53:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:53:07,372 INFO L471 AbstractCegarLoop]: Abstraction has 15546 states and 23648 transitions. [2024-11-13 23:53:07,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2024-11-13 23:53:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 23648 transitions. [2024-11-13 23:53:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 23:53:07,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:53:07,374 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:53:07,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:53:07,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 23:53:07,575 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:53:07,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:53:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1767284766, now seen corresponding path program 1 times [2024-11-13 23:53:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:53:07,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778129466] [2024-11-13 23:53:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:53:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:53:07,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:53:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778129466] [2024-11-13 23:53:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778129466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:53:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064229838] [2024-11-13 23:53:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:07,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:53:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:53:07,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:53:07,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:53:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:08,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:53:08,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:53:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:53:08,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:53:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:53:08,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064229838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:53:08,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008315211] [2024-11-13 23:53:08,752 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:53:08,752 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:53:08,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:53:08,755 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:53:08,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:53:54,211 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:54:08,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '160183#(and (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_45| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_1887~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_45|))) (exists ((v_~__return_1887~0_36 Int)) (and (<= (+ ~nl1~0 ~st1~0) 1) (<= v_~__return_1887~0_36 1) (<= 0 v_~__return_1887~0_36) (<= 2 (+ ~nl3~0 ~st3~0)) (<= 0 ~mode1~0) (= ~nomsg~0 ~p12_new~0) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= (+ ~st3~0 ~st2~0 ~st1~0) 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p21_new~0) (= ~nomsg~0 ~p32_new~0) (= ~p23_new~0 ~nomsg~0) (<= ~mode1~0 1) (<= (+ ~nl2~0 ~st2~0) 1) (<= 0 ~mode2~0) (= ~p31_new~0 ~nomsg~0) (= ~nomsg~0 ~p13_new~0))))' at error location [2024-11-13 23:54:08,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:54:08,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:54:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-13 23:54:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165961830] [2024-11-13 23:54:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:54:08,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:54:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:54:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:54:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:54:08,193 INFO L87 Difference]: Start difference. First operand 15546 states and 23648 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2024-11-13 23:54:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:54:08,366 INFO L93 Difference]: Finished difference Result 34364 states and 52517 transitions. [2024-11-13 23:54:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:54:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-13 23:54:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:54:08,421 INFO L225 Difference]: With dead ends: 34364 [2024-11-13 23:54:08,421 INFO L226 Difference]: Without dead ends: 25049 [2024-11-13 23:54:08,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:54:08,435 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 223 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:54:08,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 545 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:54:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25049 states. [2024-11-13 23:54:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25049 to 19707. [2024-11-13 23:54:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19707 states, 19706 states have (on average 1.5184715315132447) internal successors, (29923), 19706 states have internal predecessors, (29923), 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) [2024-11-13 23:54:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19707 states to 19707 states and 29923 transitions. [2024-11-13 23:54:08,823 INFO L78 Accepts]: Start accepts. Automaton has 19707 states and 29923 transitions. Word has length 64 [2024-11-13 23:54:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:54:08,824 INFO L471 AbstractCegarLoop]: Abstraction has 19707 states and 29923 transitions. [2024-11-13 23:54:08,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2024-11-13 23:54:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 19707 states and 29923 transitions. [2024-11-13 23:54:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 23:54:08,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:54:08,825 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:54:08,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 23:54:09,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:54:09,026 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:54:09,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:54:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash 929076851, now seen corresponding path program 1 times [2024-11-13 23:54:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:54:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920785505] [2024-11-13 23:54:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:54:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:54:10,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:54:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920785505] [2024-11-13 23:54:10,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920785505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:54:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209891434] [2024-11-13 23:54:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:54:10,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:54:10,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:54:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:10,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 23:54:10,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:54:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:54:11,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:54:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:54:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209891434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:54:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478820111] [2024-11-13 23:54:12,752 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:54:12,752 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:54:12,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:54:12,753 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:54:12,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:54:52,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:55:07,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '214723#(and (exists ((v_~__return_1887~0_42 Int)) (and (<= (+ ~nl1~0 ~st1~0) 1) (<= ~r1~0 1) (<= 0 ~mode1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 0)) (= ~nomsg~0 ~p12_new~0) (<= 0 ~mode3~0) (<= v_~__return_1887~0_42 1) (<= ~mode2~0 1) (<= (+ ~st3~0 ~st2~0 ~st1~0) 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p21_new~0) (= ~nomsg~0 ~p32_new~0) (= ~p23_new~0 ~nomsg~0) (<= ~mode1~0 1) (<= (+ ~nl2~0 ~st2~0) 1) (<= 0 v_~__return_1887~0_42) (<= 0 ~mode2~0) (= ~p31_new~0 ~nomsg~0) (= ~nomsg~0 ~p13_new~0) (<= (+ ~nl3~0 ~st3~0) 1))) (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_52| Int) (|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_52|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_1887~0 0))))' at error location [2024-11-13 23:55:07,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:55:07,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:55:07,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2024-11-13 23:55:07,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286194931] [2024-11-13 23:55:07,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:55:07,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 23:55:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:55:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 23:55:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 23:55:07,439 INFO L87 Difference]: Start difference. First operand 19707 states and 29923 transitions. Second operand has 29 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 29 states have internal predecessors, (173), 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) [2024-11-13 23:55:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:55:13,928 INFO L93 Difference]: Finished difference Result 66343 states and 101167 transitions. [2024-11-13 23:55:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 23:55:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 29 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-13 23:55:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:55:14,013 INFO L225 Difference]: With dead ends: 66343 [2024-11-13 23:55:14,013 INFO L226 Difference]: Without dead ends: 46825 [2024-11-13 23:55:14,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6203 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=2011, Invalid=12269, Unknown=0, NotChecked=0, Total=14280 [2024-11-13 23:55:14,040 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 3945 mSDsluCounter, 6503 mSDsCounter, 0 mSdLazyCounter, 3254 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3945 SdHoareTripleChecker+Valid, 6751 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:55:14,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3945 Valid, 6751 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3254 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 23:55:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46825 states. [2024-11-13 23:55:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46825 to 31909. [2024-11-13 23:55:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31909 states, 31908 states have (on average 1.5212799297981698) internal successors, (48541), 31908 states have internal predecessors, (48541), 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) [2024-11-13 23:55:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31909 states to 31909 states and 48541 transitions. [2024-11-13 23:55:14,552 INFO L78 Accepts]: Start accepts. Automaton has 31909 states and 48541 transitions. Word has length 66 [2024-11-13 23:55:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:55:14,553 INFO L471 AbstractCegarLoop]: Abstraction has 31909 states and 48541 transitions. [2024-11-13 23:55:14,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 29 states have internal predecessors, (173), 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) [2024-11-13 23:55:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31909 states and 48541 transitions. [2024-11-13 23:55:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 23:55:14,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:55:14,554 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:55:14,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:55:14,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:55:14,758 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:55:14,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:55:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash -689365308, now seen corresponding path program 1 times [2024-11-13 23:55:14,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:55:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901375807] [2024-11-13 23:55:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:55:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:55:15,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:55:15,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901375807] [2024-11-13 23:55:15,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901375807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:55:15,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262803029] [2024-11-13 23:55:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:15,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:55:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:55:15,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:55:15,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62a82fe-32cf-40d5-b303-e547463a1d42/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:55:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:16,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:55:16,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:55:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:55:17,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:55:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:55:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262803029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:55:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392037674] [2024-11-13 23:55:22,308 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-13 23:55:22,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:55:22,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:55:22,308 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:55:22,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs