./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s52if.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_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/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_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s52if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/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_5cd48cad-83f1-4859-8a3c-697f819316e5/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 adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:41:22,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:41:22,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:41:22,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:41:22,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:41:22,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:41:22,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:41:22,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:41:22,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:41:22,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:41:22,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:41:22,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:41:22,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:41:22,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:41:22,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:41:22,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:41:22,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:41:22,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:41:22,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:41:22,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:41:22,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:41:22,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:41:22,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:41:22,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:41:22,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:41:22,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:41:22,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:41:22,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:41:22,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:41:22,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:41:22,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:41:22,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:41:22,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:41:22,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:41:22,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:41:22,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:41:22,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:41:22,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:41:22,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:41:22,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:41:22,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:41:22,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:41:22,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:41:22,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:41:22,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:41:22,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:41:22,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:41:22,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:41:22,319 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:41:22,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:41:22,319 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:41:22,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:41:22,321 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:41:22,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:41:22,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:41:22,322 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:41:22,323 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:41:22,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:41:22,323 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:41:22,324 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:41:22,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:41:22,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:41:22,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:41:22,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:41:22,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:41:22,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:41:22,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:41:22,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:41:22,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:41:22,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:41:22,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:41:22,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:41:22,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:41:22,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:41:22,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:41:22,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:41:22,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:41:22,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:41:22,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:41:22,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:41:22,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:41:22,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:41:22,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:41:22,344 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_5cd48cad-83f1-4859-8a3c-697f819316e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 [2021-11-21 01:41:22,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:41:22,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:41:22,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:41:22,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:41:22,681 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:41:22,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s52if.c [2021-11-21 01:41:22,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/data/394ad5c63/14d05db01a5b4403933029cdce5dd43c/FLAG15e211ef5 [2021-11-21 01:41:23,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:41:23,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/sv-benchmarks/c/array-fpi/s52if.c [2021-11-21 01:41:23,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/data/394ad5c63/14d05db01a5b4403933029cdce5dd43c/FLAG15e211ef5 [2021-11-21 01:41:23,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/data/394ad5c63/14d05db01a5b4403933029cdce5dd43c [2021-11-21 01:41:23,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:41:23,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:41:23,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:41:23,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:41:23,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:41:23,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:23" (1/1) ... [2021-11-21 01:41:23,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9b72ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:23, skipping insertion in model container [2021-11-21 01:41:23,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:23" (1/1) ... [2021-11-21 01:41:23,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:41:23,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:41:23,977 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_5cd48cad-83f1-4859-8a3c-697f819316e5/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-21 01:41:24,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:41:24,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:41:24,033 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_5cd48cad-83f1-4859-8a3c-697f819316e5/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-21 01:41:24,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:41:24,060 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:41:24,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24 WrapperNode [2021-11-21 01:41:24,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:41:24,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:41:24,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:41:24,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:41:24,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,104 INFO L137 Inliner]: procedures = 17, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2021-11-21 01:41:24,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:41:24,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:41:24,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:41:24,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:41:24,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:41:24,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:41:24,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:41:24,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:41:24,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (1/1) ... [2021-11-21 01:41:24,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:41:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:24,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:41:24,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:41:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:41:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:41:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:41:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:41:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:41:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:41:24,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:41:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:41:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:41:24,308 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:41:24,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:41:24,464 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:41:24,530 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:41:24,530 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:41:24,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:24 BoogieIcfgContainer [2021-11-21 01:41:24,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:41:24,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:41:24,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:41:24,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:41:24,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:41:23" (1/3) ... [2021-11-21 01:41:24,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275bdf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:24, skipping insertion in model container [2021-11-21 01:41:24,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:24" (2/3) ... [2021-11-21 01:41:24,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275bdf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:24, skipping insertion in model container [2021-11-21 01:41:24,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:24" (3/3) ... [2021-11-21 01:41:24,544 INFO L111 eAbstractionObserver]: Analyzing ICFG s52if.c [2021-11-21 01:41:24,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:41:24,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:41:24,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:41:24,678 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 01:41:24,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:41:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 01:41:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:41:24,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:24,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:24,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1162179950, now seen corresponding path program 1 times [2021-11-21 01:41:24,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:24,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37946345] [2021-11-21 01:41:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:24,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:24,962 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 01:41:24,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37946345] [2021-11-21 01:41:24,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37946345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:41:24,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:41:24,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:41:24,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988514204] [2021-11-21 01:41:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:41:24,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:41:24,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:41:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:41:25,009 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:41:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:25,065 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-21 01:41:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:41:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:41:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:25,078 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:41:25,078 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 01:41:25,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:41:25,086 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:25,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:41:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 01:41:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 01:41:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 01:41:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-21 01:41:25,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-21 01:41:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:25,127 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-21 01:41:25,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:41:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-21 01:41:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:41:25,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:25,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:25,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:41:25,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1871859412, now seen corresponding path program 1 times [2021-11-21 01:41:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:25,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647100672] [2021-11-21 01:41:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:25,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:41:25,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:25,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647100672] [2021-11-21 01:41:25,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647100672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:41:25,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:41:25,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:41:25,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225551674] [2021-11-21 01:41:25,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:41:25,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:41:25,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:41:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:41:25,230 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:25,284 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-21 01:41:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:41:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:41:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:25,286 INFO L225 Difference]: With dead ends: 15 [2021-11-21 01:41:25,287 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:41:25,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 01:41:25,296 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:25,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:41:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:41:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:41:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 01:41:25,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 01:41:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:25,312 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 01:41:25,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 01:41:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:41:25,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:25,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:25,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:41:25,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash 908788323, now seen corresponding path program 1 times [2021-11-21 01:41:25,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057842467] [2021-11-21 01:41:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:25,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:25,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469941152] [2021-11-21 01:41:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:25,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:25,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:41:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:41:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:25,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 01:41:25,660 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 11 treesize of output 7 [2021-11-21 01:41:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:41:26,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-11-21 01:41:26,161 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-21 01:41:26,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-21 01:41:26,281 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:41:26,282 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 56 treesize of output 40 [2021-11-21 01:41:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:27,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057842467] [2021-11-21 01:41:27,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469941152] [2021-11-21 01:41:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469941152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:27,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160334808] [2021-11-21 01:41:27,842 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:41:27,842 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:27,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:27,854 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:27,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:41:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,187 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:41:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:41:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:41:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 01:41:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:28,767 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 01:41:28,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 01:41:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:41:29,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 01:41:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 26 treesize of output 14 [2021-11-21 01:41:29,802 INFO L354 Elim1Store]: treesize reduction 47, result has 44.0 percent of original size [2021-11-21 01:41:29,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2021-11-21 01:41:29,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:41:29,943 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 65 treesize of output 56 [2021-11-21 01:41:29,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:41:29,982 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 64 treesize of output 60 [2021-11-21 01:41:30,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:41:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:41:30,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:30,243 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:30,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:41:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:30,299 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:41:30,591 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:30,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:41:30,958 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:30,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:41:31,285 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:41:31,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:41:31,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:41:31,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-21 01:41:31,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038507344] [2021-11-21 01:41:31,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:31,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:41:31,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:41:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:41:31,674 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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 01:41:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:32,275 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-21 01:41:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:41:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:41:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:32,290 INFO L225 Difference]: With dead ends: 23 [2021-11-21 01:41:32,290 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:41:32,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:41:32,292 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:32,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2021-11-21 01:41:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:41:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-21 01:41:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 01:41:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-21 01:41:32,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-11-21 01:41:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:32,299 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-21 01:41:32,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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 01:41:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-21 01:41:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:41:32,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:32,300 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:32,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:32,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:32,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1323033207, now seen corresponding path program 2 times [2021-11-21 01:41:32,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:32,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827925217] [2021-11-21 01:41:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:32,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:32,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:32,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718886010] [2021-11-21 01:41:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:41:32,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:32,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:41:32,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:41:32,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:41:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:41:32,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:41:32,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827925217] [2021-11-21 01:41:32,744 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718886010] [2021-11-21 01:41:32,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718886010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687723491] [2021-11-21 01:41:32,753 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:41:32,754 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:32,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:32,755 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:32,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,908 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:41:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:41:32,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:41:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:32,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:41:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 01:41:33,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:33,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:33,393 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 01:41:33,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 01:41:33,823 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 01:41:33,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:41:33,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:41:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:34,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:41:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 01:41:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:34,143 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 45 treesize of output 27 [2021-11-21 01:41:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:34,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:41:34,189 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 1 case distinctions, treesize of input 78 treesize of output 42 [2021-11-21 01:41:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:41:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:41:34,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:34,540 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:41:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 01:41:34,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:34,814 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:41:34,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-21 01:41:34,999 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:35,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:41:35,287 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:41:35,642 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:41:35,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:41:35,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:41:35,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 01:41:35,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105110999] [2021-11-21 01:41:35,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:35,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:41:35,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:41:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:41:35,844 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 01:41:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:35,984 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-21 01:41:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:41:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 11 [2021-11-21 01:41:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:35,986 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:41:35,986 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 01:41:35,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:41:35,987 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:35,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:41:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 01:41:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-11-21 01:41:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 01:41:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-21 01:41:35,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2021-11-21 01:41:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:35,996 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-21 01:41:35,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 01:41:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-21 01:41:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:41:35,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:35,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:36,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:41:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-21 01:41:36,215 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1892164875, now seen corresponding path program 3 times [2021-11-21 01:41:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:36,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695024129] [2021-11-21 01:41:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:36,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:36,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408753157] [2021-11-21 01:41:36,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:41:36,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:36,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:36,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:41:36,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:41:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:41:36,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:41:36,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695024129] [2021-11-21 01:41:36,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408753157] [2021-11-21 01:41:36,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408753157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99675857] [2021-11-21 01:41:36,390 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:41:36,391 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:36,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:36,391 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:36,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,538 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:41:36,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:41:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:41:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:41:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 01:41:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:36,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:37,040 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 01:41:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 291 treesize of output 293 [2021-11-21 01:41:37,542 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 01:41:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:41:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:41:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:37,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:41:37,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 01:41:37,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:37,793 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 57 treesize of output 30 [2021-11-21 01:41:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:37,852 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 45 treesize of output 27 [2021-11-21 01:41:37,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:37,891 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 58 treesize of output 31 [2021-11-21 01:41:38,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:41:38,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:41:38,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:38,214 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:38,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:41:38,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:38,262 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:41:38,603 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:38,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:41:38,813 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:38,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:41:39,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:41:39,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:41:39,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:41:39,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:41:39,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546721375] [2021-11-21 01:41:39,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:41:39,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:41:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:41:39,377 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 01:41:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:39,473 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 01:41:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:41:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 11 [2021-11-21 01:41:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:39,474 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:41:39,475 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:41:39,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:41:39,476 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:39,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:41:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:41:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:41:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 01:41:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-21 01:41:39,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-11-21 01:41:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:39,481 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-21 01:41:39,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 01:41:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-21 01:41:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:41:39,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:39,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:39,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:41:39,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:39,696 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash 824956914, now seen corresponding path program 4 times [2021-11-21 01:41:39,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:39,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911767279] [2021-11-21 01:41:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:39,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:39,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:39,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215303527] [2021-11-21 01:41:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:41:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:39,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:39,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:41:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:41:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:39,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 01:41:39,799 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 11 treesize of output 7 [2021-11-21 01:41:39,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-21 01:41:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:39,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:41:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-11-21 01:41:40,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:40,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-21 01:41:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:40,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2021-11-21 01:41:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:40,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2021-11-21 01:41:40,261 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-21 01:41:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-11-21 01:41:40,344 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:41:40,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 45 [2021-11-21 01:41:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:40,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:56,497 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:43:31,221 WARN L227 SmtUtils]: Spent 1.18m on a formula simplification that was a NOOP. DAG size: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:43:56,937 WARN L227 SmtUtils]: Spent 14.74s on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:44:48,984 WARN L227 SmtUtils]: Spent 35.79s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:45:46,654 WARN L227 SmtUtils]: Spent 36.02s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:45:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:46,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911767279] [2021-11-21 01:45:46,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:45:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215303527] [2021-11-21 01:45:46,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215303527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850537755] [2021-11-21 01:45:46,891 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:45:46,891 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:46,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:46,891 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:46,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,053 INFO L354 Elim1Store]: treesize reduction 65, result has 32.3 percent of original size [2021-11-21 01:45:47,053 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 3 case distinctions, treesize of input 27 treesize of output 52 [2021-11-21 01:45:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:45:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,221 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:45:47,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:45:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 01:45:47,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:47,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:47,724 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 01:45:47,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 297 treesize of output 293 [2021-11-21 01:45:48,129 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 01:45:48,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:45:48,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:45:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:48,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:45:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 01:45:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:48,451 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 45 treesize of output 27 [2021-11-21 01:45:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:48,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:45:48,496 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 1 case distinctions, treesize of input 58 treesize of output 31 [2021-11-21 01:45:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:48,517 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 71 treesize of output 35 [2021-11-21 01:45:48,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:45:48,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:45:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:48,784 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:45:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:45:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:48,954 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:45:48,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:45:49,270 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:45:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:45:49,839 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:45:49,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:45:50,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:52,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:52,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:45:52,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-21 01:45:52,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994939230] [2021-11-21 01:45:52,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:52,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:45:52,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:45:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=526, Unknown=3, NotChecked=0, Total=600 [2021-11-21 01:45:52,834 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:07,144 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 263 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:46:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:12,740 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-11-21 01:46:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:46:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:46:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:12,741 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:46:12,741 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:46:12,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 217.4s TimeCoverageRelationStatistics Valid=97, Invalid=712, Unknown=3, NotChecked=0, Total=812 [2021-11-21 01:46:12,743 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:12,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 14 Unchecked, 5.5s Time] [2021-11-21 01:46:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:46:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-11-21 01:46:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-21 01:46:12,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-21 01:46:12,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:12,749 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-21 01:46:12,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-21 01:46:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:46:12,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:12,751 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:12,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:12,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:12,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1276501236, now seen corresponding path program 5 times [2021-11-21 01:46:12,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:12,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061203997] [2021-11-21 01:46:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:12,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:12,998 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:46:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227065824] [2021-11-21 01:46:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:46:12,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:13,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:13,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:46:13,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:46:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:46:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:46:13,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:46:13,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061203997] [2021-11-21 01:46:13,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:46:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227065824] [2021-11-21 01:46:13,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227065824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704704445] [2021-11-21 01:46:13,249 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:46:13,249 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:13,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:46:13,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:46:13,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:46:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,394 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:46:13,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:46:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:46:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:46:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 01:46:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:13,764 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 01:46:13,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 293 treesize of output 289 [2021-11-21 01:46:14,157 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 01:46:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:46:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:46:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:14,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:14,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 01:46:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:14,395 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 45 treesize of output 27 [2021-11-21 01:46:14,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:14,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:14,437 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 1 case distinctions, treesize of input 80 treesize of output 44 [2021-11-21 01:46:14,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:46:14,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:46:14,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:14,718 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:46:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 01:46:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:15,196 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:46:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-21 01:46:15,347 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:46:15,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:46:15,553 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:46:15,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:46:16,451 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:46:16,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:46:16,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:46:16,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:46:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336330859] [2021-11-21 01:46:16,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:46:16,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:46:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:46:16,675 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 01:46:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:16,880 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-21 01:46:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:46:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 14 [2021-11-21 01:46:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:16,882 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:46:16,882 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:46:16,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:46:16,883 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:16,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:46:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:46:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-21 01:46:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-21 01:46:16,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-11-21 01:46:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:16,899 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-21 01:46:16,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 01:46:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-21 01:46:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:46:16,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:16,901 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:16,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:17,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:17,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash -195971258, now seen corresponding path program 6 times [2021-11-21 01:46:17,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140482217] [2021-11-21 01:46:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:17,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:17,130 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:46:17,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215406136] [2021-11-21 01:46:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:46:17,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:17,139 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:17,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:46:17,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:46:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:46:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:46:17,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:46:17,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140482217] [2021-11-21 01:46:17,272 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:46:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215406136] [2021-11-21 01:46:17,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215406136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576974579] [2021-11-21 01:46:17,274 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:46:17,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:17,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:46:17,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:46:17,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:46:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,390 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:46:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:46:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:46:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:46:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 01:46:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:17,761 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 01:46:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 293 treesize of output 289 [2021-11-21 01:46:18,130 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 01:46:18,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:46:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:46:18,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:18,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:18,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 87 [2021-11-21 01:46:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:18,355 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 45 treesize of output 27 [2021-11-21 01:46:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:18,412 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 78 treesize of output 42 [2021-11-21 01:46:18,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 19 [2021-11-21 01:46:18,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2021-11-21 01:46:18,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:18,646 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:46:18,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 01:46:19,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:19,070 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:46:19,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-21 01:46:19,206 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:46:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:46:19,559 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:46:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:46:19,814 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:46:19,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:46:19,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:46:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 01:46:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360791492] [2021-11-21 01:46:19,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:46:19,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:46:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:46:19,994 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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 01:46:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:20,082 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-21 01:46:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:46:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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 14 [2021-11-21 01:46:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:20,083 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:46:20,083 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:46:20,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:46:20,084 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:20,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:46:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:46:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:46:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 01:46:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-21 01:46:20,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-21 01:46:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:20,090 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-21 01:46:20,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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 01:46:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-21 01:46:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:46:20,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:20,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:20,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:46:20,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:46:20,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 852757123, now seen corresponding path program 7 times [2021-11-21 01:46:20,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075071586] [2021-11-21 01:46:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:20,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:20,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:46:20,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161012802] [2021-11-21 01:46:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:46:20,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:20,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:20,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:20,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd48cad-83f1-4859-8a3c-697f819316e5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:46:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 01:46:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:20,387 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 11 treesize of output 7 [2021-11-21 01:46:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 01:46:20,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-21 01:46:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:46:20,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 01:46:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2021-11-21 01:46:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:20,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 109 [2021-11-21 01:46:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2021-11-21 01:46:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-21 01:46:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 119 [2021-11-21 01:46:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 66 [2021-11-21 01:46:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:20,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 01:46:21,084 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-21 01:46:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 49 [2021-11-21 01:46:21,177 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:46:21,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 48 [2021-11-21 01:46:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:21,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:34,740 WARN L227 SmtUtils]: Spent 24.56s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:47:57,626 WARN L227 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:50:43,139 WARN L227 SmtUtils]: Spent 1.95m on a formula simplification that was a NOOP. DAG size: 197 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:52:56,653 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse106 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse54 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse55 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse106))) (let ((.cse56 (select .cse54 .cse55))) (let ((.cse0 (= .cse56 1)) (.cse4 (* 6 c_~N~0)) (.cse23 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse25 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse28 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse106 4))) (and (or .cse0 (let ((.cse27 (store .cse54 .cse55 (+ (- 1) .cse56)))) (let ((.cse29 (select .cse27 .cse28))) (let ((.cse30 (= .cse29 1))) (and (or (let ((.cse26 (store .cse27 .cse28 (+ 5 .cse29)))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse26))) (let ((.cse22 (select .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse19 (* .cse7 .cse8)) (.cse24 (+ .cse7 .cse8))) (let ((.cse12 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse24)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse6 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse19)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse1 (= .cse6 6)) (.cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse5 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse6 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse13 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse12 .cse24))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse2 (= 6 .cse7)) (.cse10 (= .cse12 6)) (.cse14 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23))) (let ((.cse16 (= 6 .cse14)) (.cse15 (not .cse10)) (.cse11 (not .cse2)) (.cse9 (= 6 .cse13)) (.cse3 (= 6 .cse5)) (.cse17 (= 6 .cse20)) (.cse18 (not .cse1))) (and (or .cse1 .cse2 (not .cse3) (= .cse4 (+ .cse5 (* .cse6 .cse7 .cse8)))) (or (not .cse9) .cse10 .cse11 (= (+ (* .cse12 .cse8) .cse13 (* .cse12 .cse7)) .cse4)) (or .cse11 (= .cse4 (+ (* .cse14 .cse8) (* .cse14 .cse7) (* .cse12 .cse14))) .cse15 .cse16) (or (not .cse17) .cse2 .cse18 (= .cse4 (+ .cse19 .cse6 .cse20))) (or (= .cse4 (+ .cse12 .cse7 .cse8 .cse14)) (not .cse16) .cse11 .cse15) (or .cse10 .cse11 (= .cse4 (+ (* .cse12 .cse7 .cse13) (* .cse12 .cse8 .cse13))) .cse9) (or .cse1 .cse2 (= .cse4 (* .cse5 .cse6 .cse7 .cse8)) .cse3) (or .cse2 .cse17 .cse18 (= (+ (* .cse6 .cse20) (* .cse20 .cse7 .cse8)) .cse4))))))))))) (not .cse30)) (or .cse30 (let ((.cse53 (store .cse27 .cse28 (+ (- 1) .cse29)))) (let ((.cse50 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse53))) (let ((.cse51 (select .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse37 (select .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse36 (select .cse53 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse52 (+ .cse37 .cse36)) (.cse46 (* .cse36 .cse37))) (let ((.cse35 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse46)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse45 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse52)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse33 (= 6 .cse36)) (.cse48 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse37 .cse36 .cse45))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse42 (= 6 .cse45)) (.cse34 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse35 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse38 (= .cse35 6)) (.cse44 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse45 .cse52))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse40 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse35 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23))) (let ((.cse39 (= 6 .cse40)) (.cse41 (= .cse44 6)) (.cse31 (not .cse38)) (.cse32 (= 6 .cse34)) (.cse47 (not .cse42)) (.cse49 (= .cse48 6)) (.cse43 (not .cse33))) (and (or .cse31 .cse32 .cse33 (= .cse4 (+ (* .cse34 .cse35) (* .cse34 .cse36 .cse37)))) (or .cse38 (not .cse39) (= .cse4 (+ (* .cse35 .cse36 .cse37) .cse40)) .cse33) (or .cse38 .cse33 .cse39 (= .cse4 (* .cse40 .cse35 .cse36 .cse37))) (or (not .cse41) .cse42 .cse43 (= .cse4 (+ .cse44 (* .cse45 .cse37) (* .cse45 .cse36)))) (or .cse41 .cse42 .cse43 (= .cse4 (+ (* .cse44 .cse45 .cse36) (* .cse44 .cse45 .cse37)))) (or (= .cse4 (+ .cse35 .cse46 .cse34)) .cse31 .cse33 (not .cse32)) (or .cse47 (= .cse4 (+ .cse48 .cse37 .cse36 .cse45)) .cse43 (not .cse49)) (or .cse47 .cse49 .cse43 (= .cse4 (+ (* .cse36 .cse48) (* .cse45 .cse48) (* .cse48 .cse37))))))))))))))))))) (or (not .cse0) (let ((.cse80 (store .cse54 .cse55 (+ .cse56 5)))) (let ((.cse81 (select .cse80 .cse28))) (let ((.cse82 (= .cse81 1))) (and (or (let ((.cse79 (store .cse80 .cse28 (+ (- 1) .cse81)))) (let ((.cse76 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse79))) (let ((.cse77 (select .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse61 (select .cse79 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse58 (select .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse74 (* .cse61 .cse58)) (.cse78 (+ .cse58 .cse61))) (let ((.cse59 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse78)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse69 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse74)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse73 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse69 .cse74))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse67 (= .cse69 6)) (.cse65 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse58 .cse61 .cse59))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse70 (= .cse61 6)) (.cse63 (= .cse59 6)) (.cse68 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse69 .cse74))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse60 (select (select (store .cse76 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse77 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse59 .cse78))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23))) (let ((.cse57 (= 6 .cse60)) (.cse71 (= .cse68 6)) (.cse64 (not .cse63)) (.cse62 (not .cse70)) (.cse66 (= .cse65 6)) (.cse72 (not .cse67)) (.cse75 (= .cse73 6))) (and (or .cse57 (= .cse4 (+ (* .cse58 .cse59 .cse60) (* .cse61 .cse59 .cse60))) .cse62 .cse63) (or (= .cse4 (+ (* .cse61 .cse59) (* .cse58 .cse59) .cse60)) (not .cse57) .cse62 .cse63) (or .cse64 (= .cse4 (+ (* .cse58 .cse65) (* .cse65 .cse59) (* .cse61 .cse65))) .cse66 .cse62) (or .cse67 (= .cse4 (+ .cse68 (* .cse61 .cse58 .cse69))) .cse70 (not .cse71)) (or .cse67 .cse70 (= .cse4 (* .cse61 .cse58 .cse69 .cse68)) .cse71) (or .cse64 (= .cse4 (+ .cse58 .cse61 .cse65 .cse59)) .cse62 (not .cse66)) (or .cse72 .cse70 (= .cse4 (+ .cse69 .cse73 .cse74)) (not .cse75)) (or (= (+ (* .cse61 .cse58 .cse73) (* .cse73 .cse69)) .cse4) .cse72 .cse75 .cse70)))))))))) .cse82) (or (let ((.cse105 (store .cse80 .cse28 (+ 5 .cse81)))) (let ((.cse102 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse105))) (let ((.cse103 (select .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse84 (select .cse105 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse86 (select .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse101 (* .cse84 .cse86)) (.cse104 (+ .cse86 .cse84))) (let ((.cse85 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse104)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse95 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse101)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse100 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse95 .cse101))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse94 (= 6 .cse84)) (.cse83 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse85 .cse104))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse92 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse85 .cse86 .cse84))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse89 (= .cse85 6)) (.cse96 (select (select (store .cse102 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse103 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse95 .cse101))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse98 (= 6 .cse95))) (let ((.cse93 (not .cse98)) (.cse97 (= .cse96 6)) (.cse90 (not .cse89)) (.cse91 (= .cse92 6)) (.cse88 (= .cse83 6)) (.cse87 (not .cse94)) (.cse99 (= .cse100 6))) (and (or (= .cse4 (+ .cse83 (* .cse84 .cse85) (* .cse86 .cse85))) .cse87 (not .cse88) .cse89) (or .cse90 (not .cse91) (= (+ .cse85 .cse92 .cse86 .cse84) .cse4) .cse87) (or .cse93 .cse94 (= .cse4 (+ (* .cse95 .cse96) (* .cse84 .cse86 .cse96))) .cse97) (or .cse98 .cse94 (not .cse99) (= .cse4 (+ .cse100 (* .cse95 .cse84 .cse86)))) (or .cse93 .cse94 (not .cse97) (= .cse4 (+ .cse96 .cse95 .cse101))) (or .cse90 (= .cse4 (+ (* .cse86 .cse92) (* .cse85 .cse92) (* .cse84 .cse92))) .cse87 .cse91) (or .cse88 (= .cse4 (+ (* .cse84 .cse85 .cse83) (* .cse86 .cse85 .cse83))) .cse87 .cse89) (or .cse98 (= (* .cse100 .cse95 .cse84 .cse86) .cse4) .cse94 .cse99)))))))))) (not .cse82)))))))))))) is different from false