./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.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_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/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_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/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_8af9014c-72e6-4e00-a0c3-b474f61970c5/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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:49:36,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:49:36,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:49:36,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:49:36,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:49:36,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:49:36,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:49:36,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:49:36,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:49:36,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:49:36,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:49:36,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:49:36,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:49:36,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:49:36,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:49:36,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:49:36,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:49:36,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:49:36,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:49:36,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:49:36,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:49:36,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:49:36,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:49:36,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:49:36,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:49:36,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:49:36,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:49:36,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:49:36,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:49:36,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:49:36,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:49:36,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:49:36,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:49:36,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:49:36,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:49:36,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:49:36,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:49:36,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:49:36,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:49:36,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:49:36,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:49:36,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:49:36,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:49:36,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:49:36,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:49:36,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:49:36,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:49:36,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:49:36,429 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:49:36,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:49:36,430 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:49:36,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:49:36,431 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:49:36,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:49:36,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:49:36,432 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:49:36,432 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:49:36,432 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:49:36,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:49:36,433 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:49:36,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:49:36,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:49:36,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:49:36,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:49:36,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:49:36,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:49:36,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:49:36,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:49:36,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:49:36,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:49:36,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:49:36,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:49:36,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:49:36,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:49:36,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:36,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:49:36,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:49:36,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:49:36,440 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:49:36,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:49:36,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:49:36,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:49:36,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:49:36,441 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_8af9014c-72e6-4e00-a0c3-b474f61970c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2021-11-20 23:49:36,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:49:36,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:49:36,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:49:36,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:49:36,765 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:49:36,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-20 23:49:36,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/data/151014e12/9c6ae94bfa734379bcea09ccb620b91c/FLAG0b9f1c841 [2021-11-20 23:49:37,374 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:49:37,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-20 23:49:37,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/data/151014e12/9c6ae94bfa734379bcea09ccb620b91c/FLAG0b9f1c841 [2021-11-20 23:49:37,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/data/151014e12/9c6ae94bfa734379bcea09ccb620b91c [2021-11-20 23:49:37,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:49:37,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:49:37,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:37,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:49:37,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:49:37,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:37" (1/1) ... [2021-11-20 23:49:37,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e868319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:37, skipping insertion in model container [2021-11-20 23:49:37,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:37" (1/1) ... [2021-11-20 23:49:37,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:49:37,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:49:38,059 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_8af9014c-72e6-4e00-a0c3-b474f61970c5/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-20 23:49:38,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:38,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:49:38,126 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_8af9014c-72e6-4e00-a0c3-b474f61970c5/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-20 23:49:38,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:38,165 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:49:38,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38 WrapperNode [2021-11-20 23:49:38,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:38,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:38,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:49:38,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:49:38,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,213 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 23:49:38,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:38,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:49:38,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:49:38,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:49:38,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:49:38,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:49:38,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:49:38,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:49:38,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (1/1) ... [2021-11-20 23:49:38,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:38,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:49:38,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:49:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:49:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:49:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:49:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:49:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:49:38,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:49:38,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:49:38,394 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:49:38,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:49:38,538 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:49:38,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:49:38,589 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:49:38,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:38 BoogieIcfgContainer [2021-11-20 23:49:38,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:49:38,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:49:38,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:49:38,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:49:38,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:49:37" (1/3) ... [2021-11-20 23:49:38,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ad60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:38, skipping insertion in model container [2021-11-20 23:49:38,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:38" (2/3) ... [2021-11-20 23:49:38,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ad60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:38, skipping insertion in model container [2021-11-20 23:49:38,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:38" (3/3) ... [2021-11-20 23:49:38,600 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-11-20 23:49:38,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:49:38,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:49:38,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:49:38,662 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:49:38,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:49:38,676 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) [2021-11-20 23:49:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:49:38,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:38,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:38,683 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-11-20 23:49:38,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:38,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997706367] [2021-11-20 23:49:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:38,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:38,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:49:38,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997706367] [2021-11-20 23:49:38,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997706367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:49:38,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:49:38,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:49:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376098223] [2021-11-20 23:49:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:49:38,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:49:38,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:49:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:49:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:49:38,945 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) [2021-11-20 23:49:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:39,033 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-20 23:49:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:49:39,035 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 [2021-11-20 23:49:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:39,043 INFO L225 Difference]: With dead ends: 20 [2021-11-20 23:49:39,043 INFO L226 Difference]: Without dead ends: 10 [2021-11-20 23:49:39,062 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 [2021-11-20 23:49:39,066 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:39,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:49:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-20 23:49:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-20 23:49:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-20 23:49:39,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-20 23:49:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-20 23:49:39,133 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) [2021-11-20 23:49:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-20 23:49:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:49:39,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:39,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:39,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:49:39,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-11-20 23:49:39,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155690083] [2021-11-20 23:49:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:39,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:39,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:49:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785661401] [2021-11-20 23:49:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:39,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:39,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:49:39,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:49:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:49:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:49:39,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:49:39,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:49:39,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155690083] [2021-11-20 23:49:39,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:49:39,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785661401] [2021-11-20 23:49:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785661401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:49:39,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:49:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:49:39,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741148659] [2021-11-20 23:49:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:49:39,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:49:39,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:49:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:49:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:49:39,310 INFO L87 Difference]: Start difference. First operand 10 states and 12 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) [2021-11-20 23:49:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:39,363 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-20 23:49:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:49:39,364 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 [2021-11-20 23:49:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:39,366 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:49:39,366 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:49:39,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:49:39,369 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:39,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:49:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:49:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-20 23:49:39,376 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) [2021-11-20 23:49:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-20 23:49:39,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-20 23:49:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:39,377 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-20 23:49:39,378 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) [2021-11-20 23:49:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-20 23:49:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:49:39,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:39,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:39,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:39,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:39,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-11-20 23:49:39,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:39,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510762303] [2021-11-20 23:49:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:39,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:39,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:49:39,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216542115] [2021-11-20 23:49:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:39,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:39,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:49:39,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:49:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:49:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:39,812 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 [2021-11-20 23:49:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:49:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:41,414 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 23:49:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 263 treesize of output 738 [2021-11-20 23:49:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:42,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:42,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:42,156 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-20 23:49:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 202 [2021-11-20 23:49:42,501 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-20 23:49:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 836 treesize of output 798 [2021-11-20 23:49:42,718 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-20 23:49:42,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 861 treesize of output 836 [2021-11-20 23:49:42,972 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-20 23:49:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 886 treesize of output 889 [2021-11-20 23:49:43,318 INFO L354 Elim1Store]: treesize reduction 179, result has 48.1 percent of original size [2021-11-20 23:49:43,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 868 treesize of output 808 [2021-11-20 23:49:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:49:48,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:49:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510762303] [2021-11-20 23:49:48,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:49:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216542115] [2021-11-20 23:49:48,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216542115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:49:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160618387] [2021-11-20 23:49:48,500 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:49:48,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:49:48,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:49:48,510 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:49:48,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:49:48,694 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-20 23:49:48,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-20 23:49:48,854 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:49:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:49:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:49:49,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,198 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 23:49:49,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 23:49:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 23:49:49,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,359 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 23:49:49,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 70 [2021-11-20 23:49:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 155 [2021-11-20 23:49:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2021-11-20 23:49:49,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:49,492 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 23:49:49,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 23:49:49,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,652 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 33 treesize of output 33 [2021-11-20 23:49:49,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:49,781 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 [2021-11-20 23:49:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,007 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:49:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:49:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,270 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:50,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 98 [2021-11-20 23:49:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,421 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:49:50,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 184 treesize of output 117 [2021-11-20 23:49:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,474 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 571 treesize of output 311 [2021-11-20 23:49:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,588 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 146 [2021-11-20 23:49:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,774 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:49:50,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 401 treesize of output 222 [2021-11-20 23:49:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:49:50,969 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:49:50,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:50,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:51,016 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 [2021-11-20 23:49:51,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:49:51,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:49:51,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:49:51,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 23:49:51,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921830167] [2021-11-20 23:49:51,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:49:51,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:49:51,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:49:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:49:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:49:51,504 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-11-20 23:49:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:51,615 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-20 23:49:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:49:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) Word has length 9 [2021-11-20 23:49:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:51,617 INFO L225 Difference]: With dead ends: 28 [2021-11-20 23:49:51,617 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 23:49:51,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:49:51,619 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:51,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:49:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 23:49:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2021-11-20 23:49:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-11-20 23:49:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-20 23:49:51,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-20 23:49:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:51,624 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-20 23:49:51,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-11-20 23:49:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-20 23:49:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:49:51,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:51,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:51,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:51,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2021-11-20 23:49:51,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831571290] [2021-11-20 23:49:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:51,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:51,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:49:51,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851692731] [2021-11-20 23:49:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:49:51,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:51,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:49:51,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:49:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:49:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:49:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:49:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:51,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:52,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:49:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831571290] [2021-11-20 23:49:52,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:49:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851692731] [2021-11-20 23:49:52,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851692731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:49:52,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674696638] [2021-11-20 23:49:52,023 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:49:52,024 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:49:52,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:49:52,024 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:49:52,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:49:52,207 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:49:52,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:49:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-20 23:49:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2021-11-20 23:49:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,705 INFO L354 Elim1Store]: treesize reduction 266, result has 12.2 percent of original size [2021-11-20 23:49:52,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 488 treesize of output 652 [2021-11-20 23:49:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,928 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 23:49:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 396 treesize of output 342 [2021-11-20 23:49:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 102 [2021-11-20 23:49:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,463 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 23:49:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 254 [2021-11-20 23:49:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 49 [2021-11-20 23:49:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:53,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:49:53,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 299 treesize of output 226 [2021-11-20 23:49:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,411 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 33 treesize of output 33 [2021-11-20 23:49:54,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:54,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:54,452 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 [2021-11-20 23:49:54,535 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 [2021-11-20 23:49:54,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:54,731 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:49:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 23:49:54,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:54,898 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:54,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 82 [2021-11-20 23:49:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,059 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:55,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 440 treesize of output 318 [2021-11-20 23:49:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,232 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:49:55,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 157 [2021-11-20 23:49:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,442 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:49:55,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 583 treesize of output 427 [2021-11-20 23:49:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,605 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:49:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 374 treesize of output 207 [2021-11-20 23:49:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:55,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:55,776 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:49:55,777 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:49:55,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:55,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:49:55,832 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 [2021-11-20 23:49:56,124 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:49:56,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:49:56,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:49:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:49:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302166601] [2021-11-20 23:49:56,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:49:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:49:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:49:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:49:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:49:56,345 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:56,432 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-20 23:49:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:49:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:49:56,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:56,433 INFO L225 Difference]: With dead ends: 35 [2021-11-20 23:49:56,433 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 23:49:56,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:49:56,435 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:56,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:49:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 23:49:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-11-20 23:49:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-20 23:49:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-20 23:49:56,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-20 23:49:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:56,455 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-20 23:49:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-20 23:49:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:49:56,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:56,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:56,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:56,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:56,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2021-11-20 23:49:56,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:56,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664437563] [2021-11-20 23:49:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:56,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:56,707 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:49:56,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880959728] [2021-11-20 23:49:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:49:56,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:56,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:56,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:49:56,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:49:56,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:49:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:49:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:49:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:56,943 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 [2021-11-20 23:49:56,983 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-20 23:49:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-11-20 23:49:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:49:57,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:58,330 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 23:49:58,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 298 treesize of output 773 [2021-11-20 23:49:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:58,779 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-20 23:49:58,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 203 [2021-11-20 23:50:24,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:24,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 217 [2021-11-20 23:50:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 217 [2021-11-20 23:50:25,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,647 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-11-20 23:50:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 351 treesize of output 277 [2021-11-20 23:50:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:25,940 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-11-20 23:50:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 351 treesize of output 277 [2021-11-20 23:50:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:26,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 217 [2021-11-20 23:50:27,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:27,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 217 [2021-11-20 23:50:28,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 230 [2021-11-20 23:50:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 230 [2021-11-20 23:50:29,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 194 [2021-11-20 23:50:29,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 194 [2021-11-20 23:50:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,556 INFO L354 Elim1Store]: treesize reduction 112, result has 31.7 percent of original size [2021-11-20 23:50:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 219 [2021-11-20 23:50:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:32,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 305 [2021-11-20 23:50:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:33,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 134 [2021-11-20 23:50:33,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,483 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-11-20 23:50:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 603 treesize of output 556 [2021-11-20 23:50:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 104 [2021-11-20 23:50:33,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 104 [2021-11-20 23:50:35,319 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 494 treesize of output 468 [2021-11-20 23:50:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:35,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 485 treesize of output 401 [2021-11-20 23:50:35,998 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 152 [2021-11-20 23:50:36,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 71 [2021-11-20 23:50:36,095 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 155 [2021-11-20 23:50:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:36,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 98 [2021-11-20 23:50:36,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:36,368 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 301 treesize of output 287 [2021-11-20 23:50:36,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 88 [2021-11-20 23:50:36,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:36,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:36,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:36,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 259 treesize of output 326 [2021-11-20 23:50:37,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:37,274 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 272 treesize of output 260 [2021-11-20 23:50:37,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:37,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 68 [2021-11-20 23:50:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:37,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:37,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 254 treesize of output 374 [2021-11-20 23:50:41,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:41,112 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 943 treesize of output 903 [2021-11-20 23:50:41,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:50:41,135 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 903 treesize of output 861 [2021-11-20 23:50:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:43,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:43,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 707 treesize of output 613 [2021-11-20 23:50:47,443 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 23:50:47,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 349 treesize of output 275 [2021-11-20 23:50:48,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2021-11-20 23:50:49,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:49,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:49,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 94 [2021-11-20 23:50:55,426 INFO L354 Elim1Store]: treesize reduction 517, result has 38.5 percent of original size [2021-11-20 23:50:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 945 treesize of output 1015 [2021-11-20 23:50:56,408 INFO L354 Elim1Store]: treesize reduction 517, result has 38.5 percent of original size [2021-11-20 23:50:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1101 treesize of output 1152 [2021-11-20 23:51:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:51:00,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664437563] [2021-11-20 23:51:00,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880959728] [2021-11-20 23:51:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880959728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588229451] [2021-11-20 23:51:00,146 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:51:00,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:00,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:00,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:00,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:00,282 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-20 23:51:00,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-20 23:51:00,426 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:51:00,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:51:00,565 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 [2021-11-20 23:51:00,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,681 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 23:51:00,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 23:51:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 23:51:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:00,890 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 100 [2021-11-20 23:51:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 49 [2021-11-20 23:51:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 207 [2021-11-20 23:51:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:01,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 150 [2021-11-20 23:51:01,463 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 [2021-11-20 23:51:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,474 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 33 treesize of output 33 [2021-11-20 23:51:01,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:01,595 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 [2021-11-20 23:51:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,743 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:51:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:51:01,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,903 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 82 [2021-11-20 23:51:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,130 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 129 [2021-11-20 23:51:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,227 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:02,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 126 [2021-11-20 23:51:02,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 543 treesize of output 373 [2021-11-20 23:51:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,524 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:51:02,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 342 treesize of output 201 [2021-11-20 23:51:02,717 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 [2021-11-20 23:51:02,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:02,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:02,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:02,764 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:51:02,765 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:51:03,017 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:03,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:03,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:03,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-20 23:51:03,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736399949] [2021-11-20 23:51:03,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:03,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:51:03,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:51:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:51:03,202 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-11-20 23:51:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:03,429 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-20 23:51:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:51:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 11 [2021-11-20 23:51:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:03,431 INFO L225 Difference]: With dead ends: 40 [2021-11-20 23:51:03,431 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 23:51:03,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:51:03,432 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:03,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:51:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 23:51:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 17. [2021-11-20 23:51:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-20 23:51:03,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-11-20 23:51:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-20 23:51:03,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-11-20 23:51:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-20 23:51:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:51:03,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:03,439 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:03,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:51:03,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:03,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1186125732, now seen corresponding path program 4 times [2021-11-20 23:51:03,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564052339] [2021-11-20 23:51:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:03,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:03,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:03,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917332305] [2021-11-20 23:51:03,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:51:03,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:03,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:03,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:51:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:51:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:51:03,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:51:03,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564052339] [2021-11-20 23:51:03,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917332305] [2021-11-20 23:51:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917332305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630643889] [2021-11-20 23:51:03,848 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:51:03,848 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:03,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:03,848 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:03,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:03,971 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:51:03,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:51:04,043 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 29 treesize of output 39 [2021-11-20 23:51:04,144 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 [2021-11-20 23:51:04,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,400 INFO L354 Elim1Store]: treesize reduction 266, result has 12.2 percent of original size [2021-11-20 23:51:04,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 480 treesize of output 644 [2021-11-20 23:51:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 63 [2021-11-20 23:51:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,796 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 23:51:04,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 71 [2021-11-20 23:51:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:04,860 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 23:51:04,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 465 [2021-11-20 23:51:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,288 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 23:51:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 429 treesize of output 372 [2021-11-20 23:51:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 72 [2021-11-20 23:51:06,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:06,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,081 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 33 treesize of output 33 [2021-11-20 23:51:06,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:06,116 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 [2021-11-20 23:51:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:51:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,329 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:51:06,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:51:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,609 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 96 [2021-11-20 23:51:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,747 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:06,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 320 [2021-11-20 23:51:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,908 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 386 treesize of output 280 [2021-11-20 23:51:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:06,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:06,992 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:06,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 364 treesize of output 232 [2021-11-20 23:51:07,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:07,076 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 23:51:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 86 [2021-11-20 23:51:07,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:07,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:07,220 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:51:07,220 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:51:07,239 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 [2021-11-20 23:51:07,554 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:07,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:07,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:07,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-20 23:51:07,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828383555] [2021-11-20 23:51:07,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:07,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:51:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:51:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:51:07,740 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2021-11-20 23:51:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:07,874 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-20 23:51:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:51:07,875 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 13 [2021-11-20 23:51:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:07,875 INFO L225 Difference]: With dead ends: 54 [2021-11-20 23:51:07,876 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 23:51:07,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:51:07,877 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:07,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:51:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 23:51:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-20 23:51:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-20 23:51:07,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2021-11-20 23:51:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-20 23:51:07,885 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) [2021-11-20 23:51:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-20 23:51:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:51:07,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:07,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:07,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:51:08,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:51:08,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2021-11-20 23:51:08,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275438215] [2021-11-20 23:51:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:08,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:08,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740803109] [2021-11-20 23:51:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:08,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:08,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:08,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:51:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 23:51:08,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:08,283 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 [2021-11-20 23:51:08,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 23:51:08,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-20 23:51:08,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:08,393 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 36 treesize of output 32 [2021-11-20 23:51:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:08,447 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 23:51:08,447 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 4 case distinctions, treesize of input 51 treesize of output 44 [2021-11-20 23:51:08,650 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 23:51:08,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 40 [2021-11-20 23:51:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:08,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:12,964 INFO L354 Elim1Store]: treesize reduction 559, result has 31.0 percent of original size [2021-11-20 23:51:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 313 treesize of output 439 [2021-11-20 23:51:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:13,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:13,566 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 1 case distinctions, treesize of input 78 treesize of output 65 [2021-11-20 23:51:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 49 [2021-11-20 23:51:14,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 49 [2021-11-20 23:51:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 49 [2021-11-20 23:51:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 48 [2021-11-20 23:51:15,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 48 [2021-11-20 23:51:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 48 [2021-11-20 23:51:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 46 [2021-11-20 23:51:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 57 [2021-11-20 23:51:17,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2021-11-20 23:51:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 51 [2021-11-20 23:51:17,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,334 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 62 [2021-11-20 23:51:17,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:17,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 61 [2021-11-20 23:51:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:18,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:18,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 288 [2021-11-20 23:51:19,363 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-20 23:51:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 124 [2021-11-20 23:51:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:19,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275438215] [2021-11-20 23:51:19,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740803109] [2021-11-20 23:51:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740803109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442410665] [2021-11-20 23:51:19,502 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:51:19,503 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:19,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:19,503 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:19,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:19,655 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-20 23:51:19,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-20 23:51:19,802 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:51:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:51:19,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:19,967 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 [2021-11-20 23:51:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,071 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 23:51:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 23:51:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 23:51:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:20,227 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 100 [2021-11-20 23:51:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 99 [2021-11-20 23:51:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 381 treesize of output 329 [2021-11-20 23:51:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:20,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 172 [2021-11-20 23:51:20,857 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 [2021-11-20 23:51:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:20,879 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 33 treesize of output 33 [2021-11-20 23:51:20,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:20,989 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 [2021-11-20 23:51:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,134 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:51:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:51:21,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,332 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 96 [2021-11-20 23:51:21,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,396 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 367 treesize of output 227 [2021-11-20 23:51:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,786 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:21,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 712 treesize of output 519 [2021-11-20 23:51:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,958 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:21,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 492 treesize of output 347 [2021-11-20 23:51:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:22,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:22,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,060 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:22,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 161 treesize of output 83 [2021-11-20 23:51:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:22,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:51:22,202 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:51:22,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:22,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:22,299 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 [2021-11-20 23:51:23,225 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:23,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:23,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:23,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-20 23:51:23,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326777047] [2021-11-20 23:51:23,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:23,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 23:51:23,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 23:51:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:51:23,802 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:26,507 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-11-20 23:51:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:51:26,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 [2021-11-20 23:51:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:26,509 INFO L225 Difference]: With dead ends: 48 [2021-11-20 23:51:26,509 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 23:51:26,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:51:26,511 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 24 Unchecked, 1.2s Time] [2021-11-20 23:51:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 23:51:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-11-20 23:51:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-20 23:51:26,519 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 14 [2021-11-20 23:51:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:26,519 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-20 23:51:26,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-20 23:51:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:51:26,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:26,521 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:26,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:51:26,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 23:51:26,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 5 times [2021-11-20 23:51:26,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053488891] [2021-11-20 23:51:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:26,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:26,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551563348] [2021-11-20 23:51:26,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:51:26,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:26,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:26,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:26,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:51:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:51:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:51:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:51:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:27,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:27,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:27,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053488891] [2021-11-20 23:51:27,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:27,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551563348] [2021-11-20 23:51:27,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551563348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:27,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733762659] [2021-11-20 23:51:27,097 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:51:27,097 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:27,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:27,098 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:27,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:27,277 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-20 23:51:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-20 23:51:27,436 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:51:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-20 23:51:27,560 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 [2021-11-20 23:51:27,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,711 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 23:51:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 23:51:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:27,861 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 23:51:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,953 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 23:51:27,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 57 [2021-11-20 23:51:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:27,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 79 [2021-11-20 23:51:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 82 [2021-11-20 23:51:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:51:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 148 [2021-11-20 23:51:28,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,292 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 33 treesize of output 33 [2021-11-20 23:51:28,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:28,332 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 [2021-11-20 23:51:28,439 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 [2021-11-20 23:51:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,597 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:51:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:51:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,780 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:28,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 94 [2021-11-20 23:51:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,851 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:28,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 134 [2021-11-20 23:51:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,915 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:28,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 279 treesize of output 131 [2021-11-20 23:51:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:28,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:28,971 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:51:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 172 treesize of output 98 [2021-11-20 23:51:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:29,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:29,076 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 23:51:29,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 104 [2021-11-20 23:51:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:29,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:51:29,231 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:51:29,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:51:29,265 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 [2021-11-20 23:51:29,518 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:29,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:29,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:29,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-20 23:51:29,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825628732] [2021-11-20 23:51:29,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:51:29,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:51:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:51:29,713 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 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) [2021-11-20 23:51:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:30,010 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-20 23:51:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:51:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 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) Word has length 14 [2021-11-20 23:51:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:30,011 INFO L225 Difference]: With dead ends: 79 [2021-11-20 23:51:30,012 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 23:51:30,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:51:30,013 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:30,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:51:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 23:51:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-11-20 23:51:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-20 23:51:30,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 14 [2021-11-20 23:51:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:30,023 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-20 23:51:30,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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) [2021-11-20 23:51:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-20 23:51:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:51:30,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:30,026 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:30,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 23:51:30,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:30,229 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 6 times [2021-11-20 23:51:30,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:30,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453473156] [2021-11-20 23:51:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:30,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:30,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147460401] [2021-11-20 23:51:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:51:30,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:30,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:30,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8af9014c-72e6-4e00-a0c3-b474f61970c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:51:30,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:51:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:51:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 23:51:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:30,986 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 [2021-11-20 23:51:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:51:31,010 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 1 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 23:51:31,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,105 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-20 23:51:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 260 treesize of output 482 [2021-11-20 23:51:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,286 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:51:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 133 [2021-11-20 23:51:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,363 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:51:31,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 228 treesize of output 143 [2021-11-20 23:51:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,402 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:51:31,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 161 [2021-11-20 23:51:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:31,484 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:51:31,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 72 [2021-11-20 23:51:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:51:31,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:11,555 WARN L227 SmtUtils]: Spent 2.48m on a formula simplification. DAG size of input: 254 DAG size of output: 151 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:54:11,556 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 23:54:11,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 1587 treesize of output 2062 [2021-11-20 23:54:18,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:18,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:18,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:18,357 INFO L244 Elim1Store]: Index analysis took 656 ms [2021-11-20 23:54:40,519 WARN L227 SmtUtils]: Spent 20.44s on a formula simplification. DAG size of input: 51 DAG size of output: 33 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:54:40,520 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-20 23:54:40,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 204 treesize of output 204 [2021-11-20 23:54:47,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:48,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:48,431 INFO L244 Elim1Store]: Index analysis took 562 ms [2021-11-20 23:55:06,032 WARN L227 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 50 DAG size of output: 30 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:55:06,033 INFO L354 Elim1Store]: treesize reduction 114, result has 31.3 percent of original size [2021-11-20 23:55:06,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 668 treesize of output 536 [2021-11-20 23:56:12,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:12,904 INFO L244 Elim1Store]: Index analysis took 471 ms [2021-11-20 23:56:34,951 WARN L227 SmtUtils]: Spent 19.47s on a formula simplification. DAG size of input: 50 DAG size of output: 30 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:56:34,952 INFO L354 Elim1Store]: treesize reduction 114, result has 31.3 percent of original size [2021-11-20 23:56:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 668 treesize of output 536 [2021-11-20 23:57:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 625 treesize of output 453 [2021-11-20 23:57:33,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:33,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:33,625 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-20 23:57:33,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 625 treesize of output 453 [2021-11-20 23:58:38,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:38,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 94 [2021-11-20 23:58:40,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:40,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 79 [2021-11-20 23:58:52,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:52,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:52,467 INFO L244 Elim1Store]: Index analysis took 437 ms [2021-11-20 23:59:15,965 WARN L227 SmtUtils]: Spent 21.45s on a formula simplification. DAG size of input: 50 DAG size of output: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:59:15,966 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-11-20 23:59:15,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 163 [2021-11-21 00:00:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:00:03,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:00:03,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:00:03,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:00:03,115 INFO L244 Elim1Store]: Index analysis took 371 ms [2021-11-21 00:00:23,397 WARN L227 SmtUtils]: Spent 18.03s on a formula simplification. DAG size of input: 50 DAG size of output: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:00:23,398 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-11-21 00:00:23,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 395 treesize of output 285 [2021-11-21 00:01:06,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:01:06,409 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 8058 treesize of output 7328