./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:14:48,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:14:48,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:14:48,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:14:48,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:14:48,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:14:48,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:14:48,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:14:48,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:14:48,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:14:48,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:14:48,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:14:48,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:14:48,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:14:48,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:14:48,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:14:48,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:14:48,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:14:48,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:14:48,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:14:48,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:14:48,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:14:48,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:14:48,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:14:48,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:14:48,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:14:48,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:14:48,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:14:48,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:14:48,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:14:48,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:14:48,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:14:48,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:14:48,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:14:48,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:14:48,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:14:48,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:14:48,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:14:48,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:14:48,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:14:48,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:14:48,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:14:49,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:14:49,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:14:49,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:14:49,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:14:49,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:14:49,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:14:49,044 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:14:49,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:14:49,045 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:14:49,045 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:14:49,045 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:14:49,045 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:14:49,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:14:49,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:14:49,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:14:49,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:14:49,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:14:49,046 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:14:49,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:14:49,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:14:49,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:14:49,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:14:49,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:14:49,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:14:49,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:14:49,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:14:49,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:14:49,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:14:49,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:14:49,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:14:49,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:14:49,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:14:49,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:49,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:14:49,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:14:49,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:14:49,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:14:49,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:14:49,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:14:49,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:14:49,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:14:49,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2021-11-20 23:14:49,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:14:49,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:14:49,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:14:49,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:14:49,325 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:14:49,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-20 23:14:49,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/data/2c5f3131e/df57da8a3fb441ebb5e11568b660bbc9/FLAG3c1e51241 [2021-11-20 23:14:49,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:14:49,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-20 23:14:49,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/data/2c5f3131e/df57da8a3fb441ebb5e11568b660bbc9/FLAG3c1e51241 [2021-11-20 23:14:50,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/data/2c5f3131e/df57da8a3fb441ebb5e11568b660bbc9 [2021-11-20 23:14:50,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:14:50,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:14:50,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:50,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:14:50,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:14:50,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18aedcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50, skipping insertion in model container [2021-11-20 23:14:50,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:14:50,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:14:50,457 WARN L230 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_900f89b3-a66d-40e5-a996-fa2d1b3d3824/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-20 23:14:50,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:50,509 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:14:50,519 WARN L230 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_900f89b3-a66d-40e5-a996-fa2d1b3d3824/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-20 23:14:50,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:50,546 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:14:50,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50 WrapperNode [2021-11-20 23:14:50,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:50,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:50,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:14:50,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:14:50,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,599 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2021-11-20 23:14:50,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:50,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:14:50,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:14:50,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:14:50,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:14:50,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:14:50,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:14:50,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:14:50,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:50,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:14:50,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:14:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:14:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:14:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:14:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:14:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:14:50,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:14:50,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:14:50,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:14:50,839 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:14:50,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:14:51,015 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:14:51,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:14:51,062 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-20 23:14:51,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:51 BoogieIcfgContainer [2021-11-20 23:14:51,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:14:51,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:14:51,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:14:51,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:14:51,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:50" (1/3) ... [2021-11-20 23:14:51,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631c0b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:51, skipping insertion in model container [2021-11-20 23:14:51,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (2/3) ... [2021-11-20 23:14:51,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631c0b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:51, skipping insertion in model container [2021-11-20 23:14:51,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:51" (3/3) ... [2021-11-20 23:14:51,089 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2021-11-20 23:14:51,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:14:51,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:14:51,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:14:51,184 INFO L339 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:14:51,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:14:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:14:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:51,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:51,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2125816706, now seen corresponding path program 1 times [2021-11-20 23:14:51,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743180071] [2021-11-20 23:14:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:51,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:51,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:14:51,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966126601] [2021-11-20 23:14:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:51,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:51,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:51,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:14:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:51,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:14:51,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743180071] [2021-11-20 23:14:51,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:14:51,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966126601] [2021-11-20 23:14:51,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966126601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:51,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:51,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:14:51,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046427442] [2021-11-20 23:14:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:51,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:51,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:51,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:51,606 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:51,681 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-11-20 23:14:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:14:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:51,692 INFO L225 Difference]: With dead ends: 29 [2021-11-20 23:14:51,692 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 23:14:51,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:51,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:51,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:14:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 23:14:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-20 23:14:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-11-20 23:14:51,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2021-11-20 23:14:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-11-20 23:14:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-11-20 23:14:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:14:51,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:51,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:51,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:51,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:14:51,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash -952978249, now seen corresponding path program 1 times [2021-11-20 23:14:51,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:51,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015322226] [2021-11-20 23:14:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:51,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:51,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:14:51,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901868982] [2021-11-20 23:14:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:51,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:51,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:51,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:51,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:14:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:52,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:14:52,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015322226] [2021-11-20 23:14:52,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:14:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901868982] [2021-11-20 23:14:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901868982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:52,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:52,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:14:52,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842525405] [2021-11-20 23:14:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:52,097 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:52,159 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-11-20 23:14:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-20 23:14:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:52,161 INFO L225 Difference]: With dead ends: 40 [2021-11-20 23:14:52,161 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 23:14:52,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:52,163 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:52,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:14:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 23:14:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-20 23:14:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-11-20 23:14:52,171 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2021-11-20 23:14:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:52,171 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-11-20 23:14:52,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-11-20 23:14:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:14:52,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:52,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:52,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:52,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 821330551, now seen corresponding path program 1 times [2021-11-20 23:14:52,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417918897] [2021-11-20 23:14:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:52,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:52,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:14:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615987568] [2021-11-20 23:14:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:52,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:52,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:52,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:14:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:52,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:14:52,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417918897] [2021-11-20 23:14:52,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:14:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615987568] [2021-11-20 23:14:52,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615987568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:52,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:52,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:14:52,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170672277] [2021-11-20 23:14:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:52,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:52,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:52,513 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:52,568 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-11-20 23:14:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-20 23:14:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:52,569 INFO L225 Difference]: With dead ends: 43 [2021-11-20 23:14:52,570 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 23:14:52,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:52,571 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:52,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:14:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 23:14:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-20 23:14:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-11-20 23:14:52,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2021-11-20 23:14:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-11-20 23:14:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-11-20 23:14:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:14:52,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:52,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:52,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:52,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:52,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 66772088, now seen corresponding path program 1 times [2021-11-20 23:14:52,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113593756] [2021-11-20 23:14:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:52,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:52,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:14:52,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759421217] [2021-11-20 23:14:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:52,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:52,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:52,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:14:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:14:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:52,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:52,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113593756] [2021-11-20 23:14:52,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:14:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759421217] [2021-11-20 23:14:52,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759421217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:52,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039446031] [2021-11-20 23:14:53,009 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-20 23:14:53,009 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:14:53,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:14:53,019 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:14:53,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:14:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,305 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-20 23:14:53,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-20 23:14:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-20 23:14:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:54,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-20 23:14:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:54,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:54,607 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-20 23:14:54,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-20 23:14:55,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:55,236 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:55,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:56,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:56,089 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-20 23:14:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 181 [2021-11-20 23:14:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:56,440 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:56,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:56,607 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:56,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:56,940 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:14:56,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:14:57,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:57,110 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:57,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:57,274 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:57,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:57,634 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:14:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:14:57,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:57,774 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:57,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:57,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:57,981 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:58,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:58,918 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:14:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:14:59,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:59,031 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:59,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:14:59,176 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:14:59,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:14:59,232 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:14:59,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2039446031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:59,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:14:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2021-11-20 23:14:59,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267194966] [2021-11-20 23:14:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:14:59,810 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:00,285 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-11-20 23:15:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:15:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-20 23:15:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:00,286 INFO L225 Difference]: With dead ends: 42 [2021-11-20 23:15:00,286 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 23:15:00,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:15:00,289 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:00,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:15:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 23:15:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-11-20 23:15:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-20 23:15:00,300 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-20 23:15:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:00,300 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-20 23:15:00,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-20 23:15:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:15:00,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:00,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:00,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:00,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1959799413, now seen corresponding path program 1 times [2021-11-20 23:15:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251226022] [2021-11-20 23:15:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:00,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408665489] [2021-11-20 23:15:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:00,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:00,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:00,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:15:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:15:00,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:15:00,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251226022] [2021-11-20 23:15:00,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408665489] [2021-11-20 23:15:00,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408665489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127080652] [2021-11-20 23:15:00,708 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-20 23:15:00,708 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:00,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:00,709 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:00,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,864 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-20 23:15:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-20 23:15:00,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:00,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-20 23:15:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:01,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-20 23:15:01,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:01,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:01,913 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-20 23:15:01,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-20 23:15:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:02,322 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:02,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:03,139 INFO L354 Elim1Store]: treesize reduction 383, result has 10.1 percent of original size [2021-11-20 23:15:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 189 [2021-11-20 23:15:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:03,376 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:03,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:03,746 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:15:03,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:15:03,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:03,842 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:03,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:03,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:03,977 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:03,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:04,339 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:15:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:15:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:04,473 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:04,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:04,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:04,631 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:04,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:05,661 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:06,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:06,141 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:07,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:07,046 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:07,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:07,923 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:07,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:08,951 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:08,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:11,205 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:15:11,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:15:11,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:11,305 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:11,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:11,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:11,461 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:11,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:11,466 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:12,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:12,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:12,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 23:15:12,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698303056] [2021-11-20 23:15:12,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:12,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:15:12,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:15:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:15:12,603 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:12,709 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-20 23:15:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:15:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 18 [2021-11-20 23:15:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:12,710 INFO L225 Difference]: With dead ends: 64 [2021-11-20 23:15:12,710 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 23:15:12,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:15:12,711 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:12,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 23:15:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-20 23:15:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-20 23:15:12,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-11-20 23:15:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:12,725 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-20 23:15:12,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-20 23:15:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:15:12,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:12,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:12,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:12,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:12,942 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1426358148, now seen corresponding path program 2 times [2021-11-20 23:15:12,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:12,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665678963] [2021-11-20 23:15:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:12,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434889207] [2021-11-20 23:15:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:15:12,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:12,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:12,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:15:13,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:15:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:15:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 23:15:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 23:15:13,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665678963] [2021-11-20 23:15:13,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434889207] [2021-11-20 23:15:13,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434889207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373927370] [2021-11-20 23:15:13,152 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-20 23:15:13,152 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:13,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:13,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:13,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,302 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-20 23:15:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-20 23:15:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-20 23:15:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-20 23:15:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:14,652 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-20 23:15:14,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-20 23:15:15,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:15,396 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:16,448 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-20 23:15:16,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 189 [2021-11-20 23:15:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:16,941 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:16,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:17,227 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:15:17,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:15:17,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:17,366 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:17,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:17,514 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:17,936 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:15:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:15:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:18,069 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:18,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:18,172 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:18,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:19,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:19,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:19,132 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:19,525 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:20,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:20,555 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:20,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:21,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:21,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:21,183 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:21,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:21,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:22,053 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:15:22,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:15:24,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:24,149 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:24,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:24,304 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:24,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:24,407 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:15:24,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:15:24,458 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:25,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:25,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:25,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 23:15:25,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636735502] [2021-11-20 23:15:25,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:25,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:15:25,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:15:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:15:25,857 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:26,021 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2021-11-20 23:15:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:15:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 24 [2021-11-20 23:15:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:26,024 INFO L225 Difference]: With dead ends: 167 [2021-11-20 23:15:26,024 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 23:15:26,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:15:26,025 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 194 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:26,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 28 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 23:15:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-11-20 23:15:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-11-20 23:15:26,056 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2021-11-20 23:15:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:26,056 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-11-20 23:15:26,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-11-20 23:15:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:15:26,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:26,059 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:26,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:26,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -618004630, now seen corresponding path program 3 times [2021-11-20 23:15:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721328402] [2021-11-20 23:15:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:26,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897597825] [2021-11-20 23:15:26,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:15:26,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:26,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:26,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:25:44,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:25:44,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:25:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:25:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:25:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 151 proven. 1 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-20 23:25:45,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:25:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 122 proven. 30 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-20 23:25:45,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721328402] [2021-11-20 23:25:45,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:25:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897597825] [2021-11-20 23:25:45,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897597825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:25:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443092749] [2021-11-20 23:25:45,371 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-20 23:25:45,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:25:45,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:25:45,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:25:45,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:25:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,458 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-20 23:25:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-20 23:25:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,872 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-20 23:25:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-20 23:25:46,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:46,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:46,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-20 23:25:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:46,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:47,024 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-20 23:25:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-20 23:25:47,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:47,646 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:47,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:48,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:48,474 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-20 23:25:48,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 189 [2021-11-20 23:25:48,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:48,853 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:49,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:49,226 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:49,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:49,341 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:49,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:49,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:49,464 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:49,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:49,939 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:50,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:50,081 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:50,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:50,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:50,167 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:50,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:51,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:51,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:51,045 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:25:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:25:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:51,495 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:25:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:25:52,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:52,416 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:25:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:25:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:53,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:53,093 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:25:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:25:53,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:53,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:54,070 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:25:54,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:25:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:55,999 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:56,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:56,084 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:56,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:56,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:25:56,192 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:25:56,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:25:56,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:25:57,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:25:57,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:25:57,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 23:25:57,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250872322] [2021-11-20 23:25:57,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:25:57,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:25:57,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:25:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:25:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:25:57,499 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-11-20 23:25:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:25:57,666 INFO L93 Difference]: Finished difference Result 354 states and 461 transitions. [2021-11-20 23:25:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:25:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 72 [2021-11-20 23:25:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:25:57,669 INFO L225 Difference]: With dead ends: 354 [2021-11-20 23:25:57,669 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 23:25:57,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:25:57,671 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:25:57,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 19 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:25:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 23:25:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2021-11-20 23:25:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2333333333333334) internal successors, (333), 270 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:25:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 333 transitions. [2021-11-20 23:25:57,748 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 333 transitions. Word has length 72 [2021-11-20 23:25:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:25:57,748 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 333 transitions. [2021-11-20 23:25:57,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-11-20 23:25:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 333 transitions. [2021-11-20 23:25:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 23:25:57,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:25:57,753 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:25:57,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:25:57,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:25:57,954 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:25:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:25:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash -655371538, now seen corresponding path program 4 times [2021-11-20 23:25:57,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:25:57,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054688847] [2021-11-20 23:25:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:25:57,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:25:57,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:25:57,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614742059] [2021-11-20 23:25:57,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:25:57,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:25:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:25:57,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:25:58,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:25:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:25:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:25:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-20 23:25:58,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:25:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-20 23:25:59,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054688847] [2021-11-20 23:25:59,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:25:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614742059] [2021-11-20 23:25:59,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614742059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:25:59,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [32943487] [2021-11-20 23:25:59,028 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-20 23:25:59,028 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:25:59,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:25:59,028 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:25:59,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:25:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,116 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-20 23:25:59,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-20 23:25:59,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:59,486 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-20 23:25:59,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-20 23:26:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:00,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-20 23:26:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:00,805 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-20 23:26:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-20 23:26:01,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:01,523 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:01,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:26:02,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:02,364 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-20 23:26:02,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 181 [2021-11-20 23:26:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:02,727 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:02,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,036 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,188 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,275 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,744 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,868 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:03,995 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:03,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:04,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:04,720 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-20 23:26:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-20 23:26:05,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:05,291 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:26:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:26:06,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:06,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:06,218 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:26:06,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:26:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:06,826 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:26:06,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:26:07,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:07,844 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-20 23:26:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-20 23:26:10,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:10,050 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-20 23:26:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-20 23:26:10,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:10,145 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:10,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:10,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:26:10,296 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-20 23:26:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 23:26:10,302 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:26:11,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:26:11,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:26:11,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-20 23:26:11,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162366126] [2021-11-20 23:26:11,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:26:11,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:26:11,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:26:11,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:26:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:26:11,538 INFO L87 Difference]: Start difference. First operand 271 states and 333 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:26:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:26:11,880 INFO L93 Difference]: Finished difference Result 817 states and 1171 transitions. [2021-11-20 23:26:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:26:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 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 216 [2021-11-20 23:26:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:26:11,884 INFO L225 Difference]: With dead ends: 817 [2021-11-20 23:26:11,884 INFO L226 Difference]: Without dead ends: 554 [2021-11-20 23:26:11,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:26:11,887 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 146 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:26:11,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:26:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-20 23:26:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 535. [2021-11-20 23:26:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.1629213483146068) internal successors, (621), 534 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:26:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 621 transitions. [2021-11-20 23:26:11,994 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 621 transitions. Word has length 216 [2021-11-20 23:26:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:26:11,995 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 621 transitions. [2021-11-20 23:26:11,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:26:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 621 transitions. [2021-11-20 23:26:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-20 23:26:12,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:26:12,004 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:26:12,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:26:12,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:26:12,219 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:26:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:26:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 792008942, now seen corresponding path program 5 times [2021-11-20 23:26:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:26:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296806752] [2021-11-20 23:26:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:12,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:26:12,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:26:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469828681] [2021-11-20 23:26:12,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:26:12,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:26:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:26:12,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:26:12,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900f89b3-a66d-40e5-a996-fa2d1b3d3824/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process