./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr2.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_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/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_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/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_36ebf17c-73c1-4146-9aff-85932ae49ac2/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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:16:44,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:16:44,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:16:45,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:16:45,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:16:45,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:16:45,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:16:45,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:16:45,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:16:45,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:16:45,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:16:45,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:16:45,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:16:45,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:16:45,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:16:45,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:16:45,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:16:45,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:16:45,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:16:45,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:16:45,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:16:45,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:16:45,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:16:45,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:16:45,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:16:45,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:16:45,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:16:45,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:16:45,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:16:45,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:16:45,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:16:45,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:16:45,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:16:45,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:16:45,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:16:45,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:16:45,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:16:45,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:16:45,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:16:45,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:16:45,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:16:45,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:16:45,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:16:45,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:16:45,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:16:45,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:16:45,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:16:45,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:16:45,126 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:16:45,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:16:45,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:16:45,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:16:45,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:16:45,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:16:45,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:16:45,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:16:45,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:16:45,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:16:45,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:16:45,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:16:45,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:16:45,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:16:45,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:16:45,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:16:45,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:16:45,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:16:45,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:16:45,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:16:45,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:16:45,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:16:45,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:16:45,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:16:45,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:16:45,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:16:45,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:16:45,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:16:45,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:16:45,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:16:45,139 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:16:45,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:16:45,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:16:45,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:16:45,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:16:45,141 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_36ebf17c-73c1-4146-9aff-85932ae49ac2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2021-11-21 01:16:45,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:16:45,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:16:45,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:16:45,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:16:45,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:16:45,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-tiling/pnr2.c [2021-11-21 01:16:45,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/data/ed30c0e5f/8c59bbe1ce024155b63309e2beb75470/FLAG1f74f0a77 [2021-11-21 01:16:46,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:16:46,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/sv-benchmarks/c/array-tiling/pnr2.c [2021-11-21 01:16:46,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/data/ed30c0e5f/8c59bbe1ce024155b63309e2beb75470/FLAG1f74f0a77 [2021-11-21 01:16:46,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/data/ed30c0e5f/8c59bbe1ce024155b63309e2beb75470 [2021-11-21 01:16:46,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:16:46,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:16:46,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:16:46,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:16:46,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:16:46,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:46,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c47001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46, skipping insertion in model container [2021-11-21 01:16:46,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:46,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:16:46,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:16:46,903 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_36ebf17c-73c1-4146-9aff-85932ae49ac2/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2021-11-21 01:16:46,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:16:46,941 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:16:46,964 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_36ebf17c-73c1-4146-9aff-85932ae49ac2/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2021-11-21 01:16:46,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:16:46,992 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:16:46,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46 WrapperNode [2021-11-21 01:16:46,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:16:46,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:16:46,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:16:46,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:16:47,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,041 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-11-21 01:16:47,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:16:47,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:16:47,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:16:47,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:16:47,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:16:47,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:16:47,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:16:47,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:16:47,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (1/1) ... [2021-11-21 01:16:47,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:16:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:47,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:16:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:16:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:16:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:16:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:16:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:16:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-11-21 01:16:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-11-21 01:16:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:16:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:16:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:16:47,264 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:16:47,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:16:47,516 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:16:47,564 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:16:47,564 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:16:47,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:16:47 BoogieIcfgContainer [2021-11-21 01:16:47,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:16:47,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:16:47,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:16:47,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:16:47,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:16:46" (1/3) ... [2021-11-21 01:16:47,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35154bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:16:47, skipping insertion in model container [2021-11-21 01:16:47,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:46" (2/3) ... [2021-11-21 01:16:47,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35154bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:16:47, skipping insertion in model container [2021-11-21 01:16:47,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:16:47" (3/3) ... [2021-11-21 01:16:47,579 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2021-11-21 01:16:47,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:16:47,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:16:47,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:16:47,734 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 [2021-11-21 01:16:47,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:16:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:16:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:16:47,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:47,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:47,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 156665378, now seen corresponding path program 1 times [2021-11-21 01:16:47,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:47,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473509380] [2021-11-21 01:16:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:47,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:48,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473509380] [2021-11-21 01:16:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473509380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:48,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:48,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:16:48,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53057117] [2021-11-21 01:16:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:48,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:16:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:16:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:16:48,386 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:48,483 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-11-21 01:16:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:16:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:16:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:48,495 INFO L225 Difference]: With dead ends: 34 [2021-11-21 01:16:48,496 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:16:48,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:16:48,504 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:48,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:16:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:16:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-11-21 01:16:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:16:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-21 01:16:48,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2021-11-21 01:16:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:48,551 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-21 01:16:48,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-21 01:16:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:16:48,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:48,553 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:16:48,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 434925842, now seen corresponding path program 1 times [2021-11-21 01:16:48,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863519664] [2021-11-21 01:16:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:48,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:48,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:48,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863519664] [2021-11-21 01:16:48,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863519664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926453080] [2021-11-21 01:16:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:48,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:48,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:48,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:49,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:16:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:16:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:49,374 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:16:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:49,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-21 01:16:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:49,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2021-11-21 01:16:49,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:16:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:49,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-11-21 01:16:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:49,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:50,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:50,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2021-11-21 01:16:50,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:16:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:16:50,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:50,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-21 01:16:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926453080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:50,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289157026] [2021-11-21 01:16:50,406 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 01:16:50,407 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:16:50,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:16:50,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:16:50,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:16:50,684 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:16:50,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:16:50,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:16:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:16:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 50 [2021-11-21 01:16:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:52,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 56 [2021-11-21 01:16:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:54,428 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:16:54,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:16:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:54,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 85 [2021-11-21 01:16:55,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:55,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 112 [2021-11-21 01:17:02,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:17:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:17:02,719 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:17:02,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:17:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:17:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:03,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:17:03,226 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:17:03,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 387 [2021-11-21 01:17:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:04,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 115 [2021-11-21 01:17:55,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:17:55,912 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:17:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:58,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:17:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:17:58,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:17:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:18:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:07,636 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:08,367 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:08,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:09,478 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:18:09,533 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:18:10,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:18:10,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:18:10,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2021-11-21 01:18:10,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815615914] [2021-11-21 01:18:10,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:18:10,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:18:10,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:18:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:18:10,485 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:18:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:10,972 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-21 01:18:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:18:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 16 [2021-11-21 01:18:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:10,974 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:18:10,974 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:18:10,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:18:10,976 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:10,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 56 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:18:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:18:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-21 01:18:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:18:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-21 01:18:10,986 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-11-21 01:18:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:10,987 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-21 01:18:10,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:18:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-21 01:18:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:18:10,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:10,989 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:11,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:11,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 01:18:11,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2090162834, now seen corresponding path program 1 times [2021-11-21 01:18:11,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217852449] [2021-11-21 01:18:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:11,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:18:11,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217852449] [2021-11-21 01:18:11,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217852449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:18:11,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849246652] [2021-11-21 01:18:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:11,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:11,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:18:11,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:18:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:18:11,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:18:12,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:18:12,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849246652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142336313] [2021-11-21 01:18:12,261 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:18:12,261 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:18:12,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:18:12,262 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:18:12,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:18:12,453 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 01:18:12,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-21 01:18:12,555 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:18:12,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:18:13,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:13,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:18:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 62 [2021-11-21 01:18:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:14,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 77 [2021-11-21 01:18:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:15,387 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:18:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:18:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 85 [2021-11-21 01:18:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 85 [2021-11-21 01:18:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 112 [2021-11-21 01:18:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:21,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:21,595 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:18:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:18:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 106 [2021-11-21 01:18:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:22,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 115 [2021-11-21 01:18:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:23,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 118 [2021-11-21 01:18:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:33,183 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:35,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:18:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:36,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:18:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:18:45,057 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:45,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:46,602 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:47,474 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:18:47,497 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:18:48,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:18:48,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:18:48,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-11-21 01:18:48,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40051077] [2021-11-21 01:18:48,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:18:48,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:18:48,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:18:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:18:48,319 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:18:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:48,524 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-21 01:18:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:18:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22 [2021-11-21 01:18:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:48,526 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:18:48,526 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:18:48,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:18:48,528 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:48,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 27 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:18:48,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:18:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-21 01:18:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:18:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-21 01:18:48,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 22 [2021-11-21 01:18:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:48,536 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-21 01:18:48,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:18:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-21 01:18:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:18:48,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:48,537 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:48,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:48,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:18:48,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1559114146, now seen corresponding path program 2 times [2021-11-21 01:18:48,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221467685] [2021-11-21 01:18:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:48,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:18:49,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:49,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221467685] [2021-11-21 01:18:49,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221467685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:18:49,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589394318] [2021-11-21 01:18:49,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:18:49,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:49,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:18:49,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:18:49,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:18:49,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:18:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:18:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:49,179 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:18:49,183 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:18:49,240 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:18:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-21 01:18:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:49,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:18:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:49,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-21 01:18:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:18:49,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:49,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:18:49,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-21 01:18:49,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:18:49,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:18:49,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:18:49,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:18:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:18:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589394318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023296406] [2021-11-21 01:18:49,693 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:18:49,693 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:18:49,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:18:49,694 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:18:49,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:18:49,795 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:18:49,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:18:49,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:18:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:18:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 68 [2021-11-21 01:18:50,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 71 [2021-11-21 01:18:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:52,104 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:18:52,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:18:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 103 [2021-11-21 01:18:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:52,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 94 [2021-11-21 01:18:53,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:53,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 94 [2021-11-21 01:18:58,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:58,826 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:18:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:18:59,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:18:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,343 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:18:59,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 441 [2021-11-21 01:18:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 127 [2021-11-21 01:19:49,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:19:49,811 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:19:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:19:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:19:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:19:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:52,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:20:01,077 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:01,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:02,709 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:02,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:03,680 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:20:03,706 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:04,688 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:04,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:04,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2021-11-21 01:20:04,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676596514] [2021-11-21 01:20:04,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:04,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:20:04,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:20:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:20:04,692 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-21 01:20:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:05,315 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-21 01:20:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:20:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 31 [2021-11-21 01:20:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:05,318 INFO L225 Difference]: With dead ends: 45 [2021-11-21 01:20:05,318 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:20:05,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:20:05,321 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:05,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 100 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:20:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:20:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-11-21 01:20:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:20:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-21 01:20:05,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 31 [2021-11-21 01:20:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-21 01:20:05,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-21 01:20:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-21 01:20:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:20:05,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:05,334 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:05,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:05,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:05,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash 684224290, now seen corresponding path program 3 times [2021-11-21 01:20:05,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078018052] [2021-11-21 01:20:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:05,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:20:05,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078018052] [2021-11-21 01:20:05,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078018052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522049956] [2021-11-21 01:20:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:20:05,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:05,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:05,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:20:05,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:20:05,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:20:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:20:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:20:06,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:20:06,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522049956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:06,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334770367] [2021-11-21 01:20:06,657 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:20:06,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:06,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:06,658 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:06,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:06,788 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:20:06,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:20:06,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:20:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:20:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 53 [2021-11-21 01:20:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:07,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 53 [2021-11-21 01:20:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:08,927 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:20:08,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:20:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-21 01:20:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 106 [2021-11-21 01:20:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:15,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:15,194 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:20:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:20:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:15,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,511 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:20:15,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 397 [2021-11-21 01:20:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 112 [2021-11-21 01:20:55,657 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:20:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:20:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:58,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:20:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:21:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:07,864 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:09,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:09,659 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:10,764 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:21:10,793 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:21:11,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:21:11,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:21:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 28 [2021-11-21 01:21:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344341778] [2021-11-21 01:21:11,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:21:11,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:21:11,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:21:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:21:11,760 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 01:21:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:12,143 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-21 01:21:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:21:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2021-11-21 01:21:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:12,146 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:21:12,146 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:21:12,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:21:12,148 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:12,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:21:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-11-21 01:21:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:21:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-21 01:21:12,166 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 37 [2021-11-21 01:21:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:12,167 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-21 01:21:12,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 01:21:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-21 01:21:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:21:12,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:12,175 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:12,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:21:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:12,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash 669292050, now seen corresponding path program 4 times [2021-11-21 01:21:12,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:12,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124840702] [2021-11-21 01:21:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:12,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:12,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124840702] [2021-11-21 01:21:12,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124840702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:12,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768190267] [2021-11-21 01:21:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:21:12,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:12,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:12,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:12,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:21:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:21:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:13,002 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:21:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:13,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-21 01:21:13,073 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:21:13,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-21 01:21:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:13,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:21:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:13,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-21 01:21:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:13,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:21:13,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-21 01:21:13,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:21:13,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:21:13,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:21:13,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:21:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768190267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:21:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183780871] [2021-11-21 01:21:13,774 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:21:13,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:21:13,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:21:13,775 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:21:13,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:21:13,901 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:21:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:21:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:21:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:14,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:21:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:14,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 54 [2021-11-21 01:21:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:15,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-21 01:21:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:16,195 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:21:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:21:16,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 94 [2021-11-21 01:21:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 94 [2021-11-21 01:21:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:17,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 103 [2021-11-21 01:21:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:23,250 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:21:23,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:21:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:23,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 106 [2021-11-21 01:21:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 115 [2021-11-21 01:21:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:24,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 118 [2021-11-21 01:21:33,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:33,308 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:21:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:35,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:21:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:35,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 44 [2021-11-21 01:21:45,044 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:46,647 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:46,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:21:47,687 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:21:47,716 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:21:48,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:21:48,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:21:48,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2021-11-21 01:21:48,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881629839] [2021-11-21 01:21:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:21:48,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:21:48,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:21:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:21:48,805 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 12 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-21 01:21:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:50,335 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2021-11-21 01:21:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:21:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 12 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) Word has length 46 [2021-11-21 01:21:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:50,337 INFO L225 Difference]: With dead ends: 71 [2021-11-21 01:21:50,338 INFO L226 Difference]: Without dead ends: 69 [2021-11-21 01:21:50,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=544, Invalid=4012, Unknown=0, NotChecked=0, Total=4556 [2021-11-21 01:21:50,340 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:50,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 227 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:21:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-21 01:21:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-11-21 01:21:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:21:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-11-21 01:21:50,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 46 [2021-11-21 01:21:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:50,355 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-11-21 01:21:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 12 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-21 01:21:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-11-21 01:21:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:21:50,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:50,357 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:50,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:21:50,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:50,570 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1998438290, now seen corresponding path program 5 times [2021-11-21 01:21:50,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:50,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878005695] [2021-11-21 01:21:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:50,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:50,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878005695] [2021-11-21 01:21:50,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878005695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333049806] [2021-11-21 01:21:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:21:50,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:50,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:50,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:21:51,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:21:51,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:21:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:21:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:51,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:21:52,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333049806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:21:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301584730] [2021-11-21 01:21:52,093 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:21:52,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:21:52,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:21:52,093 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:21:52,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:21:52,204 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:21:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:21:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:21:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:21:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 53 [2021-11-21 01:21:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 53 [2021-11-21 01:21:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:54,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:21:54,458 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:21:54,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:21:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 85 [2021-11-21 01:21:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:21:54,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 112 [2021-11-21 01:22:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:00,301 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:22:00,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:22:00,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 103 [2021-11-21 01:22:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 130 [2021-11-21 01:22:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:11,950 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:14,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:22:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:22:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:14,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:22:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:14,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:22:23,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:23,401 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:25,076 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:22:26,028 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:22:26,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:22:27,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:22:27,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:22:27,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 37 [2021-11-21 01:22:27,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292029280] [2021-11-21 01:22:27,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:22:27,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 01:22:27,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 01:22:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 01:22:27,021 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-21 01:22:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:27,460 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-21 01:22:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:22:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 52 [2021-11-21 01:22:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:27,462 INFO L225 Difference]: With dead ends: 76 [2021-11-21 01:22:27,462 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 01:22:27,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:22:27,465 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:27,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 68 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:22:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 01:22:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-11-21 01:22:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:22:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-21 01:22:27,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 52 [2021-11-21 01:22:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:27,490 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-21 01:22:27,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 37 states have internal predecessors, (97), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-21 01:22:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-21 01:22:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 01:22:27,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:27,500 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:27,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:22:27,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:22:27,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -63907166, now seen corresponding path program 6 times [2021-11-21 01:22:27,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094380791] [2021-11-21 01:22:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:27,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:22:28,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094380791] [2021-11-21 01:22:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094380791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:22:28,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988312957] [2021-11-21 01:22:28,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:22:28,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:22:28,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:22:28,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:22:28,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:22:28,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:22:28,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:22:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:22:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:22:28,590 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:22:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-21 01:22:28,679 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:22:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-21 01:22:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:28,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:22:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-21 01:22:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:22:29,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:22:29,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:22:29,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-21 01:22:29,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:22:29,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:22:29,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:22:29,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:22:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:22:29,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988312957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:22:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845465124] [2021-11-21 01:22:29,699 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:22:29,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:22:29,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:22:29,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:22:29,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:22:29,818 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 01:22:29,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-21 01:22:29,904 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:22:29,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:22:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:22:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 57 [2021-11-21 01:22:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 60 [2021-11-21 01:22:32,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:32,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:32,227 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:22:32,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:22:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:32,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:32,910 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:22:32,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 449 treesize of output 347 [2021-11-21 01:22:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:33,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 100 [2021-11-21 01:22:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:57,553 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:22:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:22:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,162 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:22:58,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 397 [2021-11-21 01:22:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:59,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:59,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 112 [2021-11-21 01:23:50,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:23:50,281 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:23:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:23:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:23:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:23:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:24:01,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:24:01,824 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:24:03,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:24:03,475 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:24:04,439 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:24:04,470 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:24:05,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:24:05,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:24:05,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2021-11-21 01:24:05,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487999743] [2021-11-21 01:24:05,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:24:05,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 01:24:05,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 01:24:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:24:05,674 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 15 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2021-11-21 01:24:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:08,787 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2021-11-21 01:24:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:24:08,788 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 15 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) Word has length 61 [2021-11-21 01:24:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:08,790 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:24:08,790 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:24:08,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=972, Invalid=8340, Unknown=0, NotChecked=0, Total=9312 [2021-11-21 01:24:08,796 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:08,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 329 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:24:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:24:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 54. [2021-11-21 01:24:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:24:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-21 01:24:08,841 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 61 [2021-11-21 01:24:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:08,842 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-21 01:24:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 15 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2021-11-21 01:24:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-21 01:24:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:24:08,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:08,844 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:08,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:09,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:24:09,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -878159838, now seen corresponding path program 7 times [2021-11-21 01:24:09,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237420963] [2021-11-21 01:24:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:09,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:24:09,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:09,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237420963] [2021-11-21 01:24:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237420963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:09,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579563235] [2021-11-21 01:24:09,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:24:09,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:09,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:09,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:09,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:24:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:24:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:24:10,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:24:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579563235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310866531] [2021-11-21 01:24:10,964 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:24:10,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:10,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:10,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:10,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:24:11,082 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:24:11,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:24:11,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:24:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:24:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 68 [2021-11-21 01:24:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:12,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 71 [2021-11-21 01:24:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:13,255 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:24:13,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:24:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:13,652 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:24:13,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 449 treesize of output 343 [2021-11-21 01:24:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 100 [2021-11-21 01:24:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:40,065 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:24:40,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:24:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:40,697 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:24:40,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 379 [2021-11-21 01:24:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:41,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 112 [2021-11-21 01:25:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:34,896 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:36,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:25:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:25:37,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 44 [2021-11-21 01:25:45,544 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:47,225 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:47,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:48,222 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:25:48,249 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:49,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:49,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:25:49,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 46 [2021-11-21 01:25:49,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121101307] [2021-11-21 01:25:49,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:49,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:25:49,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:25:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=2786, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 01:25:49,334 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-21 01:25:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:49,771 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-11-21 01:25:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:25:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 67 [2021-11-21 01:25:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:49,773 INFO L225 Difference]: With dead ends: 93 [2021-11-21 01:25:49,773 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:25:49,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=717, Invalid=3573, Unknown=0, NotChecked=0, Total=4290 [2021-11-21 01:25:49,775 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:49,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 82 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:25:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:25:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-11-21 01:25:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:25:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-21 01:25:49,791 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 67 [2021-11-21 01:25:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:49,791 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-21 01:25:49,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-21 01:25:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-21 01:25:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:25:49,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:49,794 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:49,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:50,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1715881198, now seen corresponding path program 8 times [2021-11-21 01:25:50,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753568717] [2021-11-21 01:25:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:50,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:25:50,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:50,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753568717] [2021-11-21 01:25:50,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753568717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904212707] [2021-11-21 01:25:50,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:25:50,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:50,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:50,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:50,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:25:50,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-21 01:25:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 01:25:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:51,249 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:25:51,253 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:26:05,457 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:26:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-21 01:26:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:26:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-21 01:26:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 18 proven. 155 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:26:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:08,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:26:08,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-21 01:26:08,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:26:08,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:26:08,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:26:08,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:26:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:26:08,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904212707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697966756] [2021-11-21 01:26:08,725 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:26:08,725 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:08,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:08,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:08,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:26:08,828 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 01:26:08,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-21 01:26:08,921 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:26:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:26:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:26:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 50 [2021-11-21 01:26:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:10,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 56 [2021-11-21 01:26:11,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:11,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:11,311 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:26:11,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:26:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-21 01:26:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-21 01:26:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 106 [2021-11-21 01:26:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:17,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:17,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:18,000 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:26:18,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:26:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 112 [2021-11-21 01:26:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:18,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 121 [2021-11-21 01:26:29,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:29,795 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:32,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:26:32,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:32,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:26:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:32,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:26:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:32,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:26:41,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:41,722 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:43,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:43,354 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:44,363 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:26:44,397 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:49,748 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:49,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:49,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 19] total 46 [2021-11-21 01:26:49,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903952519] [2021-11-21 01:26:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:49,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:26:49,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:26:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3018, Unknown=10, NotChecked=0, Total=3306 [2021-11-21 01:26:49,752 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-21 01:27:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:04,670 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2021-11-21 01:27:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:27:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) Word has length 76 [2021-11-21 01:27:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:04,673 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:27:04,673 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 01:27:04,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=893, Invalid=8793, Unknown=16, NotChecked=0, Total=9702 [2021-11-21 01:27:04,678 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 154 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:04,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 448 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2005 Invalid, 0 Unknown, 41 Unchecked, 1.6s Time] [2021-11-21 01:27:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 01:27:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-11-21 01:27:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:27:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-11-21 01:27:04,709 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 76 [2021-11-21 01:27:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:04,710 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-11-21 01:27:04,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-21 01:27:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-11-21 01:27:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:27:04,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:04,713 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:04,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:04,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:27:04,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1144839022, now seen corresponding path program 9 times [2021-11-21 01:27:04,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:04,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719529177] [2021-11-21 01:27:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:04,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:27:05,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719529177] [2021-11-21 01:27:05,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719529177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834341954] [2021-11-21 01:27:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:27:05,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:05,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:05,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:27:05,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:27:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:27:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:27:06,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:27:07,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834341954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972620453] [2021-11-21 01:27:07,376 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:27:07,376 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:07,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:27:07,376 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:27:07,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:27:07,461 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 01:27:07,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-21 01:27:07,525 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:27:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:27:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:27:08,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 54 [2021-11-21 01:27:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-21 01:27:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:09,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:09,713 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:27:09,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:27:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 88 [2021-11-21 01:27:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:10,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 109 [2021-11-21 01:27:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:15,458 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:27:15,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:27:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:15,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 124 [2021-11-21 01:27:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:16,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 124 [2021-11-21 01:27:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 109 [2021-11-21 01:27:28,034 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:28,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:30,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 99 [2021-11-21 01:27:30,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:27:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:30,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-21 01:27:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:30,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 01:27:38,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:38,193 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:39,606 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:40,477 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 51 for LOIs [2021-11-21 01:27:40,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:27:41,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:27:41,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:41,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 19] total 55 [2021-11-21 01:27:41,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135164610] [2021-11-21 01:27:41,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:41,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:27:41,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:27:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=3706, Unknown=0, NotChecked=0, Total=4422 [2021-11-21 01:27:41,693 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 15 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 15 states have call predecessors, (30), 15 states have call successors, (30) [2021-11-21 01:27:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:42,284 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2021-11-21 01:27:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:27:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 15 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 15 states have call predecessors, (30), 15 states have call successors, (30) Word has length 82 [2021-11-21 01:27:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:42,286 INFO L225 Difference]: With dead ends: 112 [2021-11-21 01:27:42,286 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 01:27:42,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=970, Invalid=4730, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:27:42,289 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 190 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:42,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 111 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:27:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 01:27:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-11-21 01:27:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:27:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-11-21 01:27:42,311 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 82 [2021-11-21 01:27:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:42,313 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-11-21 01:27:42,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 15 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 15 states have call predecessors, (30), 15 states have call successors, (30) [2021-11-21 01:27:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-11-21 01:27:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:27:42,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:42,315 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:42,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:42,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:27:42,542 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash 960594850, now seen corresponding path program 10 times [2021-11-21 01:27:42,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:42,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185901238] [2021-11-21 01:27:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:42,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-21 01:27:43,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185901238] [2021-11-21 01:27:43,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185901238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:43,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439949890] [2021-11-21 01:27:43,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:27:43,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:43,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:43,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ebf17c-73c1-4146-9aff-85932ae49ac2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:27:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 01:27:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:43,493 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:27:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-21 01:27:43,577 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:27:43,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-21 01:27:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-21 01:27:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-21 01:27:44,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:44,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:44,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-21 01:27:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:27:44,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-21 01:27:44,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:44,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:27:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-21 01:27:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439949890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878351792] [2021-11-21 01:27:44,954 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:27:44,954 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:44,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:27:44,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:27:44,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:27:45,058 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 01:27:45,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-21 01:27:45,127 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 01:27:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 01:27:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-21 01:27:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 68 [2021-11-21 01:27:45,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 71 [2021-11-21 01:27:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:47,370 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-21 01:27:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 401 treesize of output 459 [2021-11-21 01:27:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:47,753 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:27:47,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 449 treesize of output 327 [2021-11-21 01:27:48,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:48,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 24 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 94 [2021-11-21 01:28:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:11,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:11,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:11,814 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:28:11,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 421 treesize of output 449 [2021-11-21 01:28:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:12,186 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:28:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 544 treesize of output 405 [2021-11-21 01:28:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:13,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 26 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 115