./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-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_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/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_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/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_1283d83c-c829-4b5e-9e55-31a312f58a44/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 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:00:24,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:00:24,771 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:00:24,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:00:24,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:00:24,814 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:00:24,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:00:24,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:00:24,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:00:24,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:00:24,818 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:00:24,819 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:00:24,819 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:00:24,819 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:00:24,819 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:00:24,819 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:00:24,819 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:00:24,820 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:00:24,820 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:00:24,820 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:00:24,821 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:00:24,821 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:00:24,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:00:24,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:00:24,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:00:24,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:00:24,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:00:24,823 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:00:24,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:00:24,824 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:00:24,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:00:24,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:00:24,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:00:24,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:00:24,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:00:24,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:00:24,826 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_1283d83c-c829-4b5e-9e55-31a312f58a44/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 -> 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e [2024-11-14 04:00:25,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:00:25,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:00:25,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:00:25,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:00:25,203 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:00:25,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-14 04:00:27,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:00:27,605 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:00:27,606 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2024-11-14 04:00:27,623 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/data/8775adc5f/c9e9c3ae43f043f7823f1d01fc58f6fe/FLAG15028f9d1 [2024-11-14 04:00:27,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/data/8775adc5f/c9e9c3ae43f043f7823f1d01fc58f6fe [2024-11-14 04:00:27,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:00:27,645 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:00:27,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:00:27,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:00:27,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:00:27,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:00:27" (1/1) ... [2024-11-14 04:00:27,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524c2eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:27, skipping insertion in model container [2024-11-14 04:00:27,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:00:27" (1/1) ... [2024-11-14 04:00:27,698 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:00:28,024 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_1283d83c-c829-4b5e-9e55-31a312f58a44/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2024-11-14 04:00:28,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:00:28,111 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:00:28,191 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_1283d83c-c829-4b5e-9e55-31a312f58a44/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2024-11-14 04:00:28,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:00:28,244 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:00:28,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28 WrapperNode [2024-11-14 04:00:28,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:00:28,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:00:28,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:00:28,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:00:28,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,339 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 669 [2024-11-14 04:00:28,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:00:28,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:00:28,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:00:28,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:00:28,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:00:28,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:00:28,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:00:28,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:00:28,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (1/1) ... [2024-11-14 04:00:28,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:00:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:00:28,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:00:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:00:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:00:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:00:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:00:28,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:00:28,716 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:00:28,717 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:00:29,602 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-14 04:00:29,603 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:00:30,141 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:00:30,142 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 04:00:30,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:00:30 BoogieIcfgContainer [2024-11-14 04:00:30,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:00:30,145 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:00:30,145 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:00:30,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:00:30,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:00:27" (1/3) ... [2024-11-14 04:00:30,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:00:30, skipping insertion in model container [2024-11-14 04:00:30,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:00:28" (2/3) ... [2024-11-14 04:00:30,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:00:30, skipping insertion in model container [2024-11-14 04:00:30,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:00:30" (3/3) ... [2024-11-14 04:00:30,154 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2024-11-14 04:00:30,175 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:00:30,179 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c that has 1 procedures, 92 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 04:00:30,258 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:00:30,277 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;@2dfe99c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:00:30,278 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:00:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 90 states have (on average 1.7555555555555555) internal successors, (158), 91 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 04:00:30,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:30,300 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] [2024-11-14 04:00:30,301 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:30,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1534935416, now seen corresponding path program 1 times [2024-11-14 04:00:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:30,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096750741] [2024-11-14 04:00:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:31,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096750741] [2024-11-14 04:00:31,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096750741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:31,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:31,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536097302] [2024-11-14 04:00:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:31,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:31,089 INFO L87 Difference]: Start difference. First operand has 92 states, 90 states have (on average 1.7555555555555555) internal successors, (158), 91 states have internal predecessors, (158), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:31,310 INFO L93 Difference]: Finished difference Result 210 states and 349 transitions. [2024-11-14 04:00:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2024-11-14 04:00:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:31,325 INFO L225 Difference]: With dead ends: 210 [2024-11-14 04:00:31,325 INFO L226 Difference]: Without dead ends: 140 [2024-11-14 04:00:31,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:31,333 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 109 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:31,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 338 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-14 04:00:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2024-11-14 04:00:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 137 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 209 transitions. [2024-11-14 04:00:31,424 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 209 transitions. Word has length 37 [2024-11-14 04:00:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:31,425 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 209 transitions. [2024-11-14 04:00:31,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 209 transitions. [2024-11-14 04:00:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 04:00:31,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:31,429 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] [2024-11-14 04:00:31,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:00:31,429 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:31,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1650012548, now seen corresponding path program 1 times [2024-11-14 04:00:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:31,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063612802] [2024-11-14 04:00:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:31,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:31,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:31,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063612802] [2024-11-14 04:00:31,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063612802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:31,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:31,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173703100] [2024-11-14 04:00:31,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:31,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:31,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:31,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:31,816 INFO L87 Difference]: Start difference. First operand 138 states and 209 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:31,986 INFO L93 Difference]: Finished difference Result 315 states and 496 transitions. [2024-11-14 04:00:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2024-11-14 04:00:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:31,992 INFO L225 Difference]: With dead ends: 315 [2024-11-14 04:00:31,992 INFO L226 Difference]: Without dead ends: 203 [2024-11-14 04:00:31,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:31,997 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 219 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 [2024-11-14 04:00:31,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 219 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-14 04:00:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-11-14 04:00:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.54) internal successors, (308), 200 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 308 transitions. [2024-11-14 04:00:32,031 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 308 transitions. Word has length 39 [2024-11-14 04:00:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:32,031 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 308 transitions. [2024-11-14 04:00:32,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 308 transitions. [2024-11-14 04:00:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:00:32,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:32,033 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:32,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:00:32,035 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:32,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 573982309, now seen corresponding path program 1 times [2024-11-14 04:00:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:32,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011199332] [2024-11-14 04:00:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:32,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011199332] [2024-11-14 04:00:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011199332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:32,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850080481] [2024-11-14 04:00:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:32,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:32,311 INFO L87 Difference]: Start difference. First operand 201 states and 308 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:32,430 INFO L93 Difference]: Finished difference Result 505 states and 799 transitions. [2024-11-14 04:00:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:32,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-14 04:00:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:32,433 INFO L225 Difference]: With dead ends: 505 [2024-11-14 04:00:32,433 INFO L226 Difference]: Without dead ends: 332 [2024-11-14 04:00:32,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:32,436 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 95 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 264 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 [2024-11-14 04:00:32,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 264 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-14 04:00:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2024-11-14 04:00:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.5653495440729484) internal successors, (515), 329 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 515 transitions. [2024-11-14 04:00:32,458 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 515 transitions. Word has length 41 [2024-11-14 04:00:32,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:32,459 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 515 transitions. [2024-11-14 04:00:32,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 515 transitions. [2024-11-14 04:00:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:00:32,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:32,461 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:32,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:00:32,461 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:32,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1069550398, now seen corresponding path program 1 times [2024-11-14 04:00:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448969685] [2024-11-14 04:00:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:32,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:32,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448969685] [2024-11-14 04:00:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448969685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:32,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34801] [2024-11-14 04:00:32,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:32,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:32,712 INFO L87 Difference]: Start difference. First operand 330 states and 515 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:32,868 INFO L93 Difference]: Finished difference Result 821 states and 1306 transitions. [2024-11-14 04:00:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-14 04:00:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:32,873 INFO L225 Difference]: With dead ends: 821 [2024-11-14 04:00:32,873 INFO L226 Difference]: Without dead ends: 519 [2024-11-14 04:00:32,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:32,880 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:32,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 235 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-14 04:00:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2024-11-14 04:00:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.5794573643410852) internal successors, (815), 516 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 815 transitions. [2024-11-14 04:00:32,943 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 815 transitions. Word has length 43 [2024-11-14 04:00:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:32,944 INFO L471 AbstractCegarLoop]: Abstraction has 517 states and 815 transitions. [2024-11-14 04:00:32,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 815 transitions. [2024-11-14 04:00:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 04:00:32,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:32,948 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] [2024-11-14 04:00:32,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:00:32,951 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:32,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1446750113, now seen corresponding path program 1 times [2024-11-14 04:00:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:32,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858357024] [2024-11-14 04:00:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:32,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:33,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:33,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858357024] [2024-11-14 04:00:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858357024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:33,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:33,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127789797] [2024-11-14 04:00:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:33,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:33,157 INFO L87 Difference]: Start difference. First operand 517 states and 815 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-11-14 04:00:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:33,417 INFO L93 Difference]: Finished difference Result 1337 states and 2134 transitions. [2024-11-14 04:00:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:33,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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 [2024-11-14 04:00:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:33,425 INFO L225 Difference]: With dead ends: 1337 [2024-11-14 04:00:33,425 INFO L226 Difference]: Without dead ends: 864 [2024-11-14 04:00:33,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:33,431 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 89 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:33,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 240 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2024-11-14 04:00:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 862. [2024-11-14 04:00:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.5807200929152148) internal successors, (1361), 861 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1361 transitions. [2024-11-14 04:00:33,484 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1361 transitions. Word has length 45 [2024-11-14 04:00:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:33,484 INFO L471 AbstractCegarLoop]: Abstraction has 862 states and 1361 transitions. [2024-11-14 04:00:33,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-11-14 04:00:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1361 transitions. [2024-11-14 04:00:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:00:33,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:33,489 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] [2024-11-14 04:00:33,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:00:33,490 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:33,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -265955757, now seen corresponding path program 1 times [2024-11-14 04:00:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489351516] [2024-11-14 04:00:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:33,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489351516] [2024-11-14 04:00:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489351516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:33,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:33,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:00:33,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582073531] [2024-11-14 04:00:33,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:33,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:00:33,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:00:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:33,695 INFO L87 Difference]: Start difference. First operand 862 states and 1361 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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) [2024-11-14 04:00:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:33,904 INFO L93 Difference]: Finished difference Result 2169 states and 3457 transitions. [2024-11-14 04:00:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:00:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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 [2024-11-14 04:00:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:33,917 INFO L225 Difference]: With dead ends: 2169 [2024-11-14 04:00:33,917 INFO L226 Difference]: Without dead ends: 1351 [2024-11-14 04:00:33,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:00:33,921 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:33,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2024-11-14 04:00:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2024-11-14 04:00:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 1.586053412462908) internal successors, (2138), 1348 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2138 transitions. [2024-11-14 04:00:34,008 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2138 transitions. Word has length 47 [2024-11-14 04:00:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:34,009 INFO L471 AbstractCegarLoop]: Abstraction has 1349 states and 2138 transitions. [2024-11-14 04:00:34,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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) [2024-11-14 04:00:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2138 transitions. [2024-11-14 04:00:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 04:00:34,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:34,014 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] [2024-11-14 04:00:34,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:00:34,015 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:34,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash 381836084, now seen corresponding path program 1 times [2024-11-14 04:00:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:34,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023730654] [2024-11-14 04:00:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:34,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:34,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023730654] [2024-11-14 04:00:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023730654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:34,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:34,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:00:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104067866] [2024-11-14 04:00:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:34,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:00:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:00:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:00:34,328 INFO L87 Difference]: Start difference. First operand 1349 states and 2138 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) [2024-11-14 04:00:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:34,742 INFO L93 Difference]: Finished difference Result 3437 states and 5465 transitions. [2024-11-14 04:00:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:00:34,743 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 [2024-11-14 04:00:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:34,755 INFO L225 Difference]: With dead ends: 3437 [2024-11-14 04:00:34,756 INFO L226 Difference]: Without dead ends: 2148 [2024-11-14 04:00:34,760 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 [2024-11-14 04:00:34,763 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 549 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 935 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 [2024-11-14 04:00:34,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 935 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:00:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2024-11-14 04:00:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2138. [2024-11-14 04:00:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5779129620963968) internal successors, (3372), 2137 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3372 transitions. [2024-11-14 04:00:34,857 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3372 transitions. Word has length 49 [2024-11-14 04:00:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:34,857 INFO L471 AbstractCegarLoop]: Abstraction has 2138 states and 3372 transitions. [2024-11-14 04:00:34,857 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) [2024-11-14 04:00:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3372 transitions. [2024-11-14 04:00:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:00:34,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:34,860 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] [2024-11-14 04:00:34,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:00:34,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:34,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1110487488, now seen corresponding path program 1 times [2024-11-14 04:00:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543756230] [2024-11-14 04:00:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:35,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543756230] [2024-11-14 04:00:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543756230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:35,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:00:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719453978] [2024-11-14 04:00:35,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:35,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:00:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:00:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:00:35,085 INFO L87 Difference]: Start difference. First operand 2138 states and 3372 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:35,270 INFO L93 Difference]: Finished difference Result 4218 states and 6669 transitions. [2024-11-14 04:00:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:00:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2024-11-14 04:00:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:35,281 INFO L225 Difference]: With dead ends: 4218 [2024-11-14 04:00:35,281 INFO L226 Difference]: Without dead ends: 2140 [2024-11-14 04:00:35,284 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 [2024-11-14 04:00:35,285 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 182 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 329 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 [2024-11-14 04:00:35,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 329 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2024-11-14 04:00:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2024-11-14 04:00:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5722976134768367) internal successors, (3360), 2137 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3360 transitions. [2024-11-14 04:00:35,383 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3360 transitions. Word has length 50 [2024-11-14 04:00:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:35,385 INFO L471 AbstractCegarLoop]: Abstraction has 2138 states and 3360 transitions. [2024-11-14 04:00:35,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3360 transitions. [2024-11-14 04:00:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 04:00:35,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:35,387 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] [2024-11-14 04:00:35,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:00:35,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:35,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash -123319941, now seen corresponding path program 1 times [2024-11-14 04:00:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:35,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467308065] [2024-11-14 04:00:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:35,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:35,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467308065] [2024-11-14 04:00:35,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467308065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:35,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:35,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:00:35,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077991832] [2024-11-14 04:00:35,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:35,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:00:35,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:00:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:00:35,594 INFO L87 Difference]: Start difference. First operand 2138 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:35,770 INFO L93 Difference]: Finished difference Result 4218 states and 6645 transitions. [2024-11-14 04:00:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:00:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2024-11-14 04:00:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:35,781 INFO L225 Difference]: With dead ends: 4218 [2024-11-14 04:00:35,781 INFO L226 Difference]: Without dead ends: 2140 [2024-11-14 04:00:35,787 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 [2024-11-14 04:00:35,791 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 190 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 335 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 [2024-11-14 04:00:35,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 335 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2024-11-14 04:00:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2024-11-14 04:00:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5666822648572765) internal successors, (3348), 2137 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3348 transitions. [2024-11-14 04:00:35,860 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3348 transitions. Word has length 51 [2024-11-14 04:00:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:35,861 INFO L471 AbstractCegarLoop]: Abstraction has 2138 states and 3348 transitions. [2024-11-14 04:00:35,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3348 transitions. [2024-11-14 04:00:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 04:00:35,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:35,862 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] [2024-11-14 04:00:35,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:00:35,863 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:35,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 418660967, now seen corresponding path program 1 times [2024-11-14 04:00:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116983700] [2024-11-14 04:00:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:36,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116983700] [2024-11-14 04:00:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116983700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:36,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:36,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:00:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018083818] [2024-11-14 04:00:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:36,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:00:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:00:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:00:36,058 INFO L87 Difference]: Start difference. First operand 2138 states and 3348 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2024-11-14 04:00:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:36,225 INFO L93 Difference]: Finished difference Result 4218 states and 6621 transitions. [2024-11-14 04:00:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:00:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 [2024-11-14 04:00:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:36,235 INFO L225 Difference]: With dead ends: 4218 [2024-11-14 04:00:36,235 INFO L226 Difference]: Without dead ends: 2140 [2024-11-14 04:00:36,238 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 [2024-11-14 04:00:36,239 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 188 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 338 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 [2024-11-14 04:00:36,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 338 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:00:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2024-11-14 04:00:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2024-11-14 04:00:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5610669162377164) internal successors, (3336), 2137 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3336 transitions. [2024-11-14 04:00:36,309 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3336 transitions. Word has length 52 [2024-11-14 04:00:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:36,309 INFO L471 AbstractCegarLoop]: Abstraction has 2138 states and 3336 transitions. [2024-11-14 04:00:36,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2024-11-14 04:00:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3336 transitions. [2024-11-14 04:00:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:00:36,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:36,310 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:36,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 04:00:36,310 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:36,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1383918968, now seen corresponding path program 1 times [2024-11-14 04:00:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:36,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603088724] [2024-11-14 04:00:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:36,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:36,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:36,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603088724] [2024-11-14 04:00:36,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603088724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:36,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:36,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:00:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264261703] [2024-11-14 04:00:36,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:36,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:00:36,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:00:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:00:36,650 INFO L87 Difference]: Start difference. First operand 2138 states and 3336 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:36,902 INFO L93 Difference]: Finished difference Result 4218 states and 6597 transitions. [2024-11-14 04:00:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:00:36,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2024-11-14 04:00:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:36,915 INFO L225 Difference]: With dead ends: 4218 [2024-11-14 04:00:36,915 INFO L226 Difference]: Without dead ends: 2140 [2024-11-14 04:00:36,918 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 [2024-11-14 04:00:36,919 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 223 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:36,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 324 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2024-11-14 04:00:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2024-11-14 04:00:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.557323350491343) internal successors, (3328), 2137 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3328 transitions. [2024-11-14 04:00:37,012 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3328 transitions. Word has length 54 [2024-11-14 04:00:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:37,012 INFO L471 AbstractCegarLoop]: Abstraction has 2138 states and 3328 transitions. [2024-11-14 04:00:37,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3328 transitions. [2024-11-14 04:00:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-14 04:00:37,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:37,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:37,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:00:37,014 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:37,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1109662739, now seen corresponding path program 1 times [2024-11-14 04:00:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:37,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272415764] [2024-11-14 04:00:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:37,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:37,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272415764] [2024-11-14 04:00:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272415764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:37,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:37,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:00:37,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626496655] [2024-11-14 04:00:37,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:37,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:00:37,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:00:37,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:00:37,340 INFO L87 Difference]: Start difference. First operand 2138 states and 3328 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:37,615 INFO L93 Difference]: Finished difference Result 5390 states and 8383 transitions. [2024-11-14 04:00:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:00:37,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2024-11-14 04:00:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:37,630 INFO L225 Difference]: With dead ends: 5390 [2024-11-14 04:00:37,630 INFO L226 Difference]: Without dead ends: 3312 [2024-11-14 04:00:37,633 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 [2024-11-14 04:00:37,634 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 74 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:37,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 450 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2024-11-14 04:00:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3310. [2024-11-14 04:00:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.5466908431550317) internal successors, (5118), 3309 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 5118 transitions. [2024-11-14 04:00:37,762 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 5118 transitions. Word has length 57 [2024-11-14 04:00:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:37,763 INFO L471 AbstractCegarLoop]: Abstraction has 3310 states and 5118 transitions. [2024-11-14 04:00:37,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 5118 transitions. [2024-11-14 04:00:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:00:37,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:37,764 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:37,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:00:37,765 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:37,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -27505544, now seen corresponding path program 1 times [2024-11-14 04:00:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292050305] [2024-11-14 04:00:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:38,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292050305] [2024-11-14 04:00:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292050305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:00:38,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:00:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:00:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804304925] [2024-11-14 04:00:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:00:38,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:00:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:00:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:00:38,438 INFO L87 Difference]: Start difference. First operand 3310 states and 5118 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:38,693 INFO L93 Difference]: Finished difference Result 3320 states and 5129 transitions. [2024-11-14 04:00:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:00:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2024-11-14 04:00:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:38,708 INFO L225 Difference]: With dead ends: 3320 [2024-11-14 04:00:38,708 INFO L226 Difference]: Without dead ends: 3318 [2024-11-14 04:00:38,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:00:38,711 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 70 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 584 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 [2024-11-14 04:00:38,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 584 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:00:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2024-11-14 04:00:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3316. [2024-11-14 04:00:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.5438914027149322) internal successors, (5118), 3315 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5118 transitions. [2024-11-14 04:00:38,819 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5118 transitions. Word has length 58 [2024-11-14 04:00:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:38,820 INFO L471 AbstractCegarLoop]: Abstraction has 3316 states and 5118 transitions. [2024-11-14 04:00:38,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5118 transitions. [2024-11-14 04:00:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 04:00:38,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:38,821 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, 1, 1, 1, 1, 1] [2024-11-14 04:00:38,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 04:00:38,822 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:00:38,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 916031206, now seen corresponding path program 1 times [2024-11-14 04:00:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223147436] [2024-11-14 04:00:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:00:41,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:41,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223147436] [2024-11-14 04:00:41,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223147436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:00:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085146777] [2024-11-14 04:00:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:41,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:00:41,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:00:41,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:00:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:41,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 04:00:41,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:00:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:46,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:01:06,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085146777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:06,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897653360] [2024-11-14 04:01:06,192 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:01:06,192 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:06,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:06,202 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:06,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:20,734 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:42,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55703#(and (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_33| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_33|))) (or (and (<= ~mode2~0 1) (<= ~mode3~0 1) (<= ~mode1~0 1)) (and (<= 0 ~mode1~0) (<= 0 ~mode3~0) (<= 0 ~mode2~0))))' at error location [2024-11-14 04:01:42,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:42,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:42,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 16] total 44 [2024-11-14 04:01:42,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3721761] [2024-11-14 04:01:42,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:42,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:01:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:01:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=8409, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 04:01:42,958 INFO L87 Difference]: Start difference. First operand 3316 states and 5118 transitions. Second operand has 44 states, 44 states have (on average 4.318181818181818) internal successors, (190), 44 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:34,911 INFO L93 Difference]: Finished difference Result 45339 states and 71010 transitions. [2024-11-14 04:03:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2024-11-14 04:03:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.318181818181818) internal successors, (190), 44 states have internal predecessors, (190), 0 states have call successors, (0), 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 68 [2024-11-14 04:03:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:35,032 INFO L225 Difference]: With dead ends: 45339 [2024-11-14 04:03:35,032 INFO L226 Difference]: Without dead ends: 42083 [2024-11-14 04:03:35,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50835 ImplicationChecksByTransitivity, 120.2s TimeCoverageRelationStatistics Valid=13604, Invalid=97618, Unknown=0, NotChecked=0, Total=111222 [2024-11-14 04:03:35,060 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 10320 mSDsluCounter, 13284 mSDsCounter, 0 mSdLazyCounter, 7541 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10320 SdHoareTripleChecker+Valid, 13446 SdHoareTripleChecker+Invalid, 7823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 7541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:35,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10320 Valid, 13446 Invalid, 7823 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [282 Valid, 7541 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2024-11-14 04:03:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42083 states. [2024-11-14 04:03:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42083 to 38981. [2024-11-14 04:03:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38981 states, 38980 states have (on average 1.5615700359158542) internal successors, (60870), 38980 states have internal predecessors, (60870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38981 states to 38981 states and 60870 transitions. [2024-11-14 04:03:36,133 INFO L78 Accepts]: Start accepts. Automaton has 38981 states and 60870 transitions. Word has length 68 [2024-11-14 04:03:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:36,134 INFO L471 AbstractCegarLoop]: Abstraction has 38981 states and 60870 transitions. [2024-11-14 04:03:36,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.318181818181818) internal successors, (190), 44 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38981 states and 60870 transitions. [2024-11-14 04:03:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 04:03:36,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:36,136 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:36,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:03:36,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:36,341 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:36,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1730307890, now seen corresponding path program 1 times [2024-11-14 04:03:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:36,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223838001] [2024-11-14 04:03:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:36,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:03:36,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223838001] [2024-11-14 04:03:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223838001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499770651] [2024-11-14 04:03:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:36,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:36,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:36,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:03:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:37,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:03:37,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:03:37,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:03:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499770651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424809155] [2024-11-14 04:03:37,526 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:03:37,526 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:37,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:37,527 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:37,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:50,832 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:09,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140962#(and (or (and (<= ~mode2~0 1) (<= ~mode3~0 1) (<= ~mode1~0 1)) (and (<= 0 ~mode1~0) (<= 0 ~mode3~0) (<= 0 ~mode2~0))) (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_49| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_49|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0))))' at error location [2024-11-14 04:04:09,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:09,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:09,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-14 04:04:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575770829] [2024-11-14 04:04:09,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:09,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:04:09,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:04:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:04:09,488 INFO L87 Difference]: Start difference. First operand 38981 states and 60870 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:09,909 INFO L93 Difference]: Finished difference Result 88787 states and 139594 transitions. [2024-11-14 04:04:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:04:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 69 [2024-11-14 04:04:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:10,072 INFO L225 Difference]: With dead ends: 88787 [2024-11-14 04:04:10,073 INFO L226 Difference]: Without dead ends: 59825 [2024-11-14 04:04:10,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:04:10,116 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 352 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:10,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 513 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:04:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59825 states. [2024-11-14 04:04:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59825 to 43530. [2024-11-14 04:04:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43530 states, 43529 states have (on average 1.5517241379310345) internal successors, (67545), 43529 states have internal predecessors, (67545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 67545 transitions. [2024-11-14 04:04:11,249 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 67545 transitions. Word has length 69 [2024-11-14 04:04:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:11,249 INFO L471 AbstractCegarLoop]: Abstraction has 43530 states and 67545 transitions. [2024-11-14 04:04:11,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 67545 transitions. [2024-11-14 04:04:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 04:04:11,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:11,254 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:11,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:04:11,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:11,457 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:04:11,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2137084077, now seen corresponding path program 1 times [2024-11-14 04:04:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:11,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413212717] [2024-11-14 04:04:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:04:11,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413212717] [2024-11-14 04:04:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413212717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308118784] [2024-11-14 04:04:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:11,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:11,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:04:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:12,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:04:12,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:04:12,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:04:12,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308118784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935948843] [2024-11-14 04:04:12,862 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:04:12,863 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:12,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:12,863 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:12,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:32,563 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:49,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '273754#(exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_69| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_69|)))' at error location [2024-11-14 04:04:49,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:49,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-14 04:04:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568877185] [2024-11-14 04:04:49,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:49,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:04:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:04:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2941, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 04:04:49,994 INFO L87 Difference]: Start difference. First operand 43530 states and 67545 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:50,271 INFO L93 Difference]: Finished difference Result 93220 states and 145330 transitions. [2024-11-14 04:04:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:04:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 70 [2024-11-14 04:04:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:50,434 INFO L225 Difference]: With dead ends: 93220 [2024-11-14 04:04:50,434 INFO L226 Difference]: Without dead ends: 66380 [2024-11-14 04:04:50,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=599, Invalid=2941, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 04:04:50,468 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 482 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:50,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 418 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:04:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66380 states. [2024-11-14 04:04:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66380 to 50503. [2024-11-14 04:04:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50503 states, 50502 states have (on average 1.5463942022098134) internal successors, (78096), 50502 states have internal predecessors, (78096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50503 states to 50503 states and 78096 transitions. [2024-11-14 04:04:51,853 INFO L78 Accepts]: Start accepts. Automaton has 50503 states and 78096 transitions. Word has length 70 [2024-11-14 04:04:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:51,854 INFO L471 AbstractCegarLoop]: Abstraction has 50503 states and 78096 transitions. [2024-11-14 04:04:51,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 50503 states and 78096 transitions. [2024-11-14 04:04:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:04:51,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:51,856 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, 1, 1, 1, 1, 1] [2024-11-14 04:04:51,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:04:52,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:04:52,057 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:04:52,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1771708789, now seen corresponding path program 1 times [2024-11-14 04:04:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:52,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194424118] [2024-11-14 04:04:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:04:52,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:52,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194424118] [2024-11-14 04:04:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194424118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871620042] [2024-11-14 04:04:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:52,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:52,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:52,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:52,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:04:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:52,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:04:52,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:04:53,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:04:53,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871620042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:53,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142479589] [2024-11-14 04:04:53,401 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:04:53,402 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:53,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:53,402 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:53,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:14,742 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:33,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '417957#(exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_76| Int) (|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_76|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0)))' at error location [2024-11-14 04:05:33,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:33,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:05:33,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-14 04:05:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463187040] [2024-11-14 04:05:33,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:33,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:05:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:05:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=3073, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:05:33,134 INFO L87 Difference]: Start difference. First operand 50503 states and 78096 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:33,588 INFO L93 Difference]: Finished difference Result 110477 states and 171730 transitions. [2024-11-14 04:05:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:05:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 71 [2024-11-14 04:05:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:33,719 INFO L225 Difference]: With dead ends: 110477 [2024-11-14 04:05:33,719 INFO L226 Difference]: Without dead ends: 80693 [2024-11-14 04:05:33,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=587, Invalid=3073, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:05:33,750 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 385 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:33,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 524 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:05:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80693 states. [2024-11-14 04:05:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80693 to 61704. [2024-11-14 04:05:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61704 states, 61703 states have (on average 1.5438471387128665) internal successors, (95260), 61703 states have internal predecessors, (95260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61704 states to 61704 states and 95260 transitions. [2024-11-14 04:05:35,473 INFO L78 Accepts]: Start accepts. Automaton has 61704 states and 95260 transitions. Word has length 71 [2024-11-14 04:05:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:35,474 INFO L471 AbstractCegarLoop]: Abstraction has 61704 states and 95260 transitions. [2024-11-14 04:05:35,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61704 states and 95260 transitions. [2024-11-14 04:05:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 04:05:35,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:35,476 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:35,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:05:35,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:05:35,681 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:35,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 287785222, now seen corresponding path program 1 times [2024-11-14 04:05:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013668094] [2024-11-14 04:05:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:05:38,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:38,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013668094] [2024-11-14 04:05:38,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013668094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:38,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852728575] [2024-11-14 04:05:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:38,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:38,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:38,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:05:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:38,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 04:05:38,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:05:39,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:05:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852728575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:41,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746678468] [2024-11-14 04:05:41,989 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:05:41,989 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:41,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:41,989 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:41,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:06:04,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:06:24,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590658#(and (<= ~r1~0 1) (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_83| Int) (|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_83|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0))))' at error location [2024-11-14 04:06:24,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:06:24,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:06:24,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2024-11-14 04:06:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732640923] [2024-11-14 04:06:24,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:06:24,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:06:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:06:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:06:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=6379, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 04:06:24,770 INFO L87 Difference]: Start difference. First operand 61704 states and 95260 transitions. Second operand has 33 states, 33 states have (on average 5.909090909090909) internal successors, (195), 33 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:06:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:34,447 INFO L93 Difference]: Finished difference Result 248114 states and 384727 transitions. [2024-11-14 04:06:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 04:06:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.909090909090909) internal successors, (195), 33 states have internal predecessors, (195), 0 states have call successors, (0), 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 73 [2024-11-14 04:06:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:34,769 INFO L225 Difference]: With dead ends: 248114 [2024-11-14 04:06:34,769 INFO L226 Difference]: Without dead ends: 187173 [2024-11-14 04:06:34,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8079 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=2703, Invalid=15657, Unknown=0, NotChecked=0, Total=18360 [2024-11-14 04:06:34,829 INFO L432 NwaCegarLoop]: 314 mSDtfsCounter, 5787 mSDsluCounter, 10031 mSDsCounter, 0 mSdLazyCounter, 3454 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5787 SdHoareTripleChecker+Valid, 10345 SdHoareTripleChecker+Invalid, 3616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:34,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5787 Valid, 10345 Invalid, 3616 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [162 Valid, 3454 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 04:06:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187173 states. [2024-11-14 04:06:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187173 to 137480. [2024-11-14 04:06:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137480 states, 137479 states have (on average 1.5468107856472626) internal successors, (212654), 137479 states have internal predecessors, (212654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:06:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137480 states to 137480 states and 212654 transitions. [2024-11-14 04:06:36,868 INFO L78 Accepts]: Start accepts. Automaton has 137480 states and 212654 transitions. Word has length 73 [2024-11-14 04:06:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:36,869 INFO L471 AbstractCegarLoop]: Abstraction has 137480 states and 212654 transitions. [2024-11-14 04:06:36,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.909090909090909) internal successors, (195), 33 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:06:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 137480 states and 212654 transitions. [2024-11-14 04:06:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 04:06:36,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:36,871 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:36,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:06:37,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:06:37,072 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:06:37,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1393738337, now seen corresponding path program 1 times [2024-11-14 04:06:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:37,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663555924] [2024-11-14 04:06:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:38,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663555924] [2024-11-14 04:06:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663555924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:06:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844556364] [2024-11-14 04:06:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:38,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:38,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:38,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:06:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:38,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 04:06:38,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:06:40,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:06:47,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844556364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859553422] [2024-11-14 04:06:47,652 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:06:47,652 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:47,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:47,652 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:47,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:07:07,642 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:29,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '976889#(and (<= ~r1~0 1) (exists ((|v_ULTIMATE.start_main_~__tmp_1~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~0#1_90| Int)) (and (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_90|) (= |v_ULTIMATE.start_main_~__tmp_1~0#1_5| 0) (= ~__return_2060~0 0))))' at error location [2024-11-14 04:07:29,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:07:29,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:29,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2024-11-14 04:07:29,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770088969] [2024-11-14 04:07:29,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:07:29,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:07:29,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:07:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=6751, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 04:07:29,162 INFO L87 Difference]: Start difference. First operand 137480 states and 212654 transitions. Second operand has 35 states, 35 states have (on average 5.857142857142857) internal successors, (205), 35 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:07:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:07:47,873 INFO L93 Difference]: Finished difference Result 827124 states and 1285000 transitions. [2024-11-14 04:07:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-14 04:07:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.857142857142857) internal successors, (205), 35 states have internal predecessors, (205), 0 states have call successors, (0), 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 76 [2024-11-14 04:07:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:07:50,193 INFO L225 Difference]: With dead ends: 827124 [2024-11-14 04:07:50,193 INFO L226 Difference]: Without dead ends: 689812 [2024-11-14 04:07:50,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12122 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=3875, Invalid=23847, Unknown=0, NotChecked=0, Total=27722 [2024-11-14 04:07:50,647 INFO L432 NwaCegarLoop]: 397 mSDtfsCounter, 9442 mSDsluCounter, 11386 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9442 SdHoareTripleChecker+Valid, 11783 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:07:50,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9442 Valid, 11783 Invalid, 4673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [232 Valid, 4441 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-14 04:07:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689812 states. [2024-11-14 04:08:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689812 to 621398. [2024-11-14 04:08:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621398 states, 621397 states have (on average 1.5563174588869917) internal successors, (967091), 621397 states have internal predecessors, (967091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:08:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621398 states to 621398 states and 967091 transitions. [2024-11-14 04:08:05,186 INFO L78 Accepts]: Start accepts. Automaton has 621398 states and 967091 transitions. Word has length 76 [2024-11-14 04:08:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:05,187 INFO L471 AbstractCegarLoop]: Abstraction has 621398 states and 967091 transitions. [2024-11-14 04:08:05,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.857142857142857) internal successors, (205), 35 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:08:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 621398 states and 967091 transitions. [2024-11-14 04:08:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 04:08:05,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:05,197 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:05,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:08:05,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1283d83c-c829-4b5e-9e55-31a312f58a44/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:05,398 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:05,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash -243914490, now seen corresponding path program 1 times [2024-11-14 04:08:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:05,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347181781] [2024-11-14 04:08:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:08:05,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347181781] [2024-11-14 04:08:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347181781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:05,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:08:05,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:08:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084513595] [2024-11-14 04:08:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:05,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:08:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:08:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:08:05,884 INFO L87 Difference]: Start difference. First operand 621398 states and 967091 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) [2024-11-14 04:08:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:10,449 INFO L93 Difference]: Finished difference Result 1007134 states and 1571155 transitions. [2024-11-14 04:08:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:08:10,450 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 77 [2024-11-14 04:08:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:11,236 INFO L225 Difference]: With dead ends: 1007134 [2024-11-14 04:08:11,236 INFO L226 Difference]: Without dead ends: 459750 [2024-11-14 04:08:11,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:08:11,424 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 112 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:11,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 554 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:08:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459750 states.