./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array3_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array3_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V --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 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:17:03,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:17:03,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:17:03,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:17:03,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:17:03,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:17:03,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:17:03,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:17:03,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:17:03,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:17:03,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:17:03,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:17:03,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:17:03,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:17:03,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:17:03,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:17:03,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:17:03,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:17:03,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:17:03,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:17:03,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:17:03,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:17:03,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:17:03,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:17:03,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:17:03,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:17:03,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:17:03,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:17:03,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:17:03,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:17:03,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:17:03,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:17:03,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:17:03,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:17:03,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:17:03,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:17:03,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:17:03,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:17:03,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:17:03,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:17:03,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:17:03,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:17:03,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:17:03,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:17:03,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:17:03,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:17:03,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:17:03,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:17:03,524 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:17:03,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:17:03,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:17:03,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:17:03,526 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:17:03,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:17:03,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:17:03,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:17:03,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:17:03,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:17:03,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:17:03,528 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:17:03,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:17:03,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:17:03,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:17:03,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:17:03,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:17:03,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:17:03,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:17:03,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:17:03,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:17:03,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:17:03,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:17:03,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:17:03,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:17:03,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:17:03,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:17:03,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:17:03,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:17:03,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:17:03,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:17:03,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:17:03,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:17:03,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:17:03,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:17:03,537 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_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 [2021-11-23 02:17:03,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:17:03,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:17:03,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:17:03,859 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:17:03,860 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:17:03,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-patterns/array3_pattern.c [2021-11-23 02:17:03,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/data/1f98b6aad/756f0335be65427f8813843f8b9c5027/FLAG35f0c27ad [2021-11-23 02:17:04,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:17:04,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/sv-benchmarks/c/array-patterns/array3_pattern.c [2021-11-23 02:17:04,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/data/1f98b6aad/756f0335be65427f8813843f8b9c5027/FLAG35f0c27ad [2021-11-23 02:17:04,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/data/1f98b6aad/756f0335be65427f8813843f8b9c5027 [2021-11-23 02:17:04,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:17:04,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:17:04,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:17:04,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:17:04,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:17:04,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:04" (1/1) ... [2021-11-23 02:17:04,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8de816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:04, skipping insertion in model container [2021-11-23 02:17:04,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:04" (1/1) ... [2021-11-23 02:17:04,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:17:04,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:17:05,085 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_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2021-11-23 02:17:05,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:17:05,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:17:05,130 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_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2021-11-23 02:17:05,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:17:05,160 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:17:05,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05 WrapperNode [2021-11-23 02:17:05,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:17:05,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:17:05,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:17:05,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:17:05,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,198 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-11-23 02:17:05,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:17:05,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:17:05,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:17:05,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:17:05,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:17:05,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:17:05,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:17:05,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:17:05,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (1/1) ... [2021-11-23 02:17:05,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:17:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:05,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:17:05,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:17:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:17:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:17:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:17:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:17:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:17:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:17:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure square [2021-11-23 02:17:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure square [2021-11-23 02:17:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:17:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:17:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:17:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:17:05,371 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:17:05,372 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:17:05,563 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:17:05,590 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:17:05,591 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:17:05,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:05 BoogieIcfgContainer [2021-11-23 02:17:05,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:17:05,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:17:05,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:17:05,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:17:05,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:17:04" (1/3) ... [2021-11-23 02:17:05,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b1ea31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:05, skipping insertion in model container [2021-11-23 02:17:05,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:05" (2/3) ... [2021-11-23 02:17:05,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b1ea31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:05, skipping insertion in model container [2021-11-23 02:17:05,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:05" (3/3) ... [2021-11-23 02:17:05,606 INFO L111 eAbstractionObserver]: Analyzing ICFG array3_pattern.c [2021-11-23 02:17:05,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:17:05,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:17:05,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:17:05,688 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 [2021-11-23 02:17:05,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:17:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:17:05,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:05,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:05,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 168211832, now seen corresponding path program 1 times [2021-11-23 02:17:05,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:05,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593071470] [2021-11-23 02:17:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:05,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:05,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593071470] [2021-11-23 02:17:05,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593071470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:05,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:05,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:17:05,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892714633] [2021-11-23 02:17:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:05,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:17:05,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:17:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:17:06,024 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:17:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:06,068 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-23 02:17:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:17:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:17:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:06,077 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:17:06,078 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:17:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:17:06,084 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:06,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:17:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:17:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 02:17:06,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-11-23 02:17:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:06,147 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 02:17:06,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:17:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 02:17:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:17:06,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:06,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:17:06,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1604099434, now seen corresponding path program 1 times [2021-11-23 02:17:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:06,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979291971] [2021-11-23 02:17:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:06,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:06,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:06,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397194587] [2021-11-23 02:17:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:06,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:06,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:06,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:17:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:17:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:17:06,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:06,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:06,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979291971] [2021-11-23 02:17:06,495 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397194587] [2021-11-23 02:17:06,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397194587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:06,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:17:06,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126029191] [2021-11-23 02:17:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:06,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:17:06,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:17:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:17:06,506 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:17:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:06,566 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-23 02:17:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:17:06,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 02:17:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:06,576 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:17:06,576 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:17:06,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:06,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:06,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:17:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-23 02:17:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-23 02:17:06,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-11-23 02:17:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:06,598 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-23 02:17:06,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:17:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-23 02:17:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:17:06,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:06,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:06,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:06,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:06,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -874793495, now seen corresponding path program 1 times [2021-11-23 02:17:06,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683793530] [2021-11-23 02:17:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:06,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:06,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:06,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574244017] [2021-11-23 02:17:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:06,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:06,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:06,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:17:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:17:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:17:07,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:07,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683793530] [2021-11-23 02:17:07,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574244017] [2021-11-23 02:17:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574244017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:07,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:07,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:17:07,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080940290] [2021-11-23 02:17:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:07,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:17:07,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:17:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:07,031 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:17:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:07,111 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-23 02:17:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:17:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-23 02:17:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:07,116 INFO L225 Difference]: With dead ends: 45 [2021-11-23 02:17:07,116 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:17:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:17:07,121 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:07,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:17:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-23 02:17:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 02:17:07,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 25 [2021-11-23 02:17:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:07,134 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 02:17:07,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:17:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 02:17:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:17:07,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:07,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:07,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:07,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:07,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash -578077241, now seen corresponding path program 1 times [2021-11-23 02:17:07,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:07,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760961533] [2021-11-23 02:17:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:07,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:07,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:07,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923839836] [2021-11-23 02:17:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:07,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:07,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:07,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:17:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 02:17:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:07,591 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 [2021-11-23 02:17:07,695 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 27 treesize of output 15 [2021-11-23 02:17:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:08,347 INFO L354 Elim1Store]: treesize reduction 393, result has 10.9 percent of original size [2021-11-23 02:17:08,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 219 treesize of output 163 [2021-11-23 02:17:08,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:08,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 67 [2021-11-23 02:17:09,582 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-11-23 02:17:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 36 [2021-11-23 02:17:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:09,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:19,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760961533] [2021-11-23 02:17:19,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923839836] [2021-11-23 02:17:19,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923839836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483727040] [2021-11-23 02:17:19,542 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:17:19,542 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:19,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:19,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:19,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,734 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:17:19,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:17:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,758 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 55 treesize of output 65 [2021-11-23 02:17:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:17:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:19,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:19,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:20,041 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:17:20,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 405 treesize of output 403 [2021-11-23 02:17:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:20,396 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:17:20,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:17:20,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:20,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:20,858 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:17:20,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 02:17:20,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,066 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:21,066 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 2 case distinctions, treesize of input 128 treesize of output 89 [2021-11-23 02:17:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:21,163 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 108 treesize of output 69 [2021-11-23 02:17:21,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,255 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:21,255 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 2 case distinctions, treesize of input 108 treesize of output 69 [2021-11-23 02:17:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-11-23 02:17:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 85 [2021-11-23 02:17:21,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:21,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:21,706 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 2 case distinctions, treesize of input 501 treesize of output 403 [2021-11-23 02:17:23,622 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:17:23,651 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 36 for LOIs [2021-11-23 02:17:23,702 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:26,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:26,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:26,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:26,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-23 02:17:26,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839083424] [2021-11-23 02:17:26,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:26,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:17:26,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:17:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1964, Unknown=1, NotChecked=0, Total=2162 [2021-11-23 02:17:26,867 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:27,066 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-11-23 02:17:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:17:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-23 02:17:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:27,069 INFO L225 Difference]: With dead ends: 44 [2021-11-23 02:17:27,069 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 02:17:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=208, Invalid=2047, Unknown=1, NotChecked=0, Total=2256 [2021-11-23 02:17:27,072 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:27,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 111 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2021-11-23 02:17:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 02:17:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-23 02:17:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:17:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-23 02:17:27,081 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 26 [2021-11-23 02:17:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:27,082 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-23 02:17:27,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:17:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-23 02:17:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:17:27,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:27,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:27,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:27,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:27,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash 30192041, now seen corresponding path program 2 times [2021-11-23 02:17:27,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:27,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031480320] [2021-11-23 02:17:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:27,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:27,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:27,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567426213] [2021-11-23 02:17:27,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:17:27,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:27,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:17:27,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:17:27,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:17:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:17:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:17:27,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031480320] [2021-11-23 02:17:27,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567426213] [2021-11-23 02:17:27,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567426213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579106244] [2021-11-23 02:17:27,574 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:17:27,575 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:27,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:27,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:27,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,685 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:17:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:17:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,705 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 55 treesize of output 65 [2021-11-23 02:17:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:17:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:27,974 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:17:27,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 405 treesize of output 403 [2021-11-23 02:17:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:28,304 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:17:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:17:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,626 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:17:28,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 494 [2021-11-23 02:17:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:28,748 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 2 case distinctions, treesize of input 155 treesize of output 143 [2021-11-23 02:17:28,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:28,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:28,879 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 2 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 02:17:28,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:29,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 43 [2021-11-23 02:17:29,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:29,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 75 [2021-11-23 02:17:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:29,094 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 129 treesize of output 75 [2021-11-23 02:17:29,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:31,519 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:17:31,545 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 37 for LOIs [2021-11-23 02:17:31,586 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:33,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '860#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:33,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:33,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:17:33,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 02:17:33,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134572598] [2021-11-23 02:17:33,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:17:33,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:17:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:17:33,128 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:17:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:33,333 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2021-11-23 02:17:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:17:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2021-11-23 02:17:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:33,335 INFO L225 Difference]: With dead ends: 69 [2021-11-23 02:17:33,335 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 02:17:33,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:17:33,337 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:33,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 60 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 02:17:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-11-23 02:17:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:17:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-11-23 02:17:33,350 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 27 [2021-11-23 02:17:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:33,350 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-11-23 02:17:33,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:17:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-11-23 02:17:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:17:33,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:33,352 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:33,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:17:33,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:33,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2115367227, now seen corresponding path program 1 times [2021-11-23 02:17:33,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:33,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045015004] [2021-11-23 02:17:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:33,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:33,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:33,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568272238] [2021-11-23 02:17:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:33,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:33,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:33,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:17:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:33,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 02:17:33,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:33,694 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 [2021-11-23 02:17:33,724 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 27 treesize of output 15 [2021-11-23 02:17:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,208 INFO L354 Elim1Store]: treesize reduction 401, result has 10.7 percent of original size [2021-11-23 02:17:34,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 232 treesize of output 168 [2021-11-23 02:17:34,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 57 [2021-11-23 02:17:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,624 INFO L354 Elim1Store]: treesize reduction 393, result has 10.9 percent of original size [2021-11-23 02:17:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 219 treesize of output 163 [2021-11-23 02:17:34,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 60 [2021-11-23 02:17:35,694 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-11-23 02:17:35,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 36 [2021-11-23 02:17:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:17:35,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:43,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045015004] [2021-11-23 02:17:43,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568272238] [2021-11-23 02:17:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568272238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726954119] [2021-11-23 02:17:43,503 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:17:43,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:43,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:43,504 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:43,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,628 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 02:17:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-23 02:17:43,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,710 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:17:43,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:17:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:17:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:43,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:43,921 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:17:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 02:17:43,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:43,991 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:17:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:17:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,388 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:17:44,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 02:17:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,527 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:44,527 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 2 case distinctions, treesize of input 110 treesize of output 71 [2021-11-23 02:17:44,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:44,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:44,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:44,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:44,812 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 2 case distinctions, treesize of input 133 treesize of output 121 [2021-11-23 02:17:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:44,848 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 246 treesize of output 175 [2021-11-23 02:17:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:44,862 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 208 treesize of output 154 [2021-11-23 02:17:44,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:44,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:44,979 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 2 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 02:17:45,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 02:17:45,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:45,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,042 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:17:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 02:17:46,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:46,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,254 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:46,254 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 2 case distinctions, treesize of input 191 treesize of output 136 [2021-11-23 02:17:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,386 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:46,386 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 2 case distinctions, treesize of input 170 treesize of output 83 [2021-11-23 02:17:46,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:46,439 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 440 treesize of output 305 [2021-11-23 02:17:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 60 [2021-11-23 02:17:46,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:46,616 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 2 case distinctions, treesize of input 131 treesize of output 60 [2021-11-23 02:17:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:46,719 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 409 treesize of output 290 [2021-11-23 02:17:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 372 treesize of output 268 [2021-11-23 02:17:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 403 treesize of output 283 [2021-11-23 02:17:47,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 66 [2021-11-23 02:17:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,058 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 412 treesize of output 287 [2021-11-23 02:17:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,071 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 332 treesize of output 221 [2021-11-23 02:17:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,167 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 105 treesize of output 66 [2021-11-23 02:17:47,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 437 treesize of output 300 [2021-11-23 02:17:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,307 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 339 treesize of output 244 [2021-11-23 02:17:47,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,425 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 105 treesize of output 66 [2021-11-23 02:17:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,457 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 702 treesize of output 575 [2021-11-23 02:17:47,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:47,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:47,474 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 575 treesize of output 413 [2021-11-23 02:17:49,299 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 81 for LOIs [2021-11-23 02:17:49,335 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 36 for LOIs [2021-11-23 02:17:49,376 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:52,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1239#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:52,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:52,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:52,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-23 02:17:52,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888462326] [2021-11-23 02:17:52,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:52,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:17:52,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:17:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:17:52,367 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:17:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:53,439 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-11-23 02:17:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:17:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2021-11-23 02:17:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:53,441 INFO L225 Difference]: With dead ends: 67 [2021-11-23 02:17:53,442 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 02:17:53,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=271, Invalid=2381, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:17:53,444 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:53,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 151 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2021-11-23 02:17:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 02:17:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-11-23 02:17:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:17:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-23 02:17:53,469 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 32 [2021-11-23 02:17:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:53,470 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-23 02:17:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:17:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-23 02:17:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:17:53,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:53,471 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:53,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:53,698 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1089524180, now seen corresponding path program 3 times [2021-11-23 02:17:53,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220280906] [2021-11-23 02:17:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:53,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:17:53,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64134045] [2021-11-23 02:17:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:17:53,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:53,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:53,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:17:53,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:17:53,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:17:53,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:17:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:17:54,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220280906] [2021-11-23 02:17:54,000 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:17:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64134045] [2021-11-23 02:17:54,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64134045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877342299] [2021-11-23 02:17:54,004 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:17:54,004 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:54,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:54,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:54,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,116 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:17:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:17:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,131 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 55 treesize of output 65 [2021-11-23 02:17:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:17:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:54,337 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:17:54,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 02:17:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:54,417 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:17:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:17:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,047 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:17:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 02:17:55,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:55,313 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 2 case distinctions, treesize of input 110 treesize of output 98 [2021-11-23 02:17:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2021-11-23 02:17:55,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,553 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:17:55,554 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 2 case distinctions, treesize of input 167 treesize of output 112 [2021-11-23 02:17:55,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 126 [2021-11-23 02:17:55,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 278 [2021-11-23 02:17:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:55,877 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 353 treesize of output 223 [2021-11-23 02:17:55,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 286 [2021-11-23 02:17:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:55,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:55,930 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 347 treesize of output 247 [2021-11-23 02:17:55,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:56,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:56,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,066 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 208 treesize of output 153 [2021-11-23 02:17:56,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:56,218 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 173 treesize of output 126 [2021-11-23 02:17:56,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:17:58,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:17:58,776 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 36 for LOIs [2021-11-23 02:17:58,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:00,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1646#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:00,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:00,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:18:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 02:18:00,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023792508] [2021-11-23 02:18:00,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:18:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:18:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:18:00,519 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:18:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:00,650 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-23 02:18:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:18:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 35 [2021-11-23 02:18:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:00,652 INFO L225 Difference]: With dead ends: 62 [2021-11-23 02:18:00,652 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 02:18:00,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:18:00,654 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:00,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 57 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:18:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 02:18:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-11-23 02:18:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:18:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-23 02:18:00,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 35 [2021-11-23 02:18:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:00,661 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-23 02:18:00,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:18:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-23 02:18:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:18:00,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:00,663 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:00,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:00,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:00,866 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2056583306, now seen corresponding path program 4 times [2021-11-23 02:18:00,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454093392] [2021-11-23 02:18:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:00,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:00,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:18:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172843633] [2021-11-23 02:18:00,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:18:00,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:00,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:18:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:01,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-23 02:18:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:01,136 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 [2021-11-23 02:18:01,175 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 27 treesize of output 15 [2021-11-23 02:18:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:01,228 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 57 treesize of output 45 [2021-11-23 02:18:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:01,807 INFO L354 Elim1Store]: treesize reduction 581, result has 16.5 percent of original size [2021-11-23 02:18:01,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 240 treesize of output 239 [2021-11-23 02:18:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:03,027 INFO L354 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2021-11-23 02:18:03,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 320 [2021-11-23 02:18:25,410 INFO L354 Elim1Store]: treesize reduction 122, result has 12.2 percent of original size [2021-11-23 02:18:25,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 236 treesize of output 131 [2021-11-23 02:18:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:18:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:41,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:41,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454093392] [2021-11-23 02:18:41,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:18:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172843633] [2021-11-23 02:18:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172843633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848941319] [2021-11-23 02:18:41,176 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:18:41,177 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:41,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:41,177 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:41,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,289 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:18:41,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:18:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,307 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 55 treesize of output 65 [2021-11-23 02:18:41,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:18:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:41,543 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:18:41,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 405 treesize of output 403 [2021-11-23 02:18:41,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:41,682 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:18:41,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:18:41,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,234 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:18:42,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 02:18:42,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,443 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:18:42,444 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 2 case distinctions, treesize of input 133 treesize of output 94 [2021-11-23 02:18:42,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:42,535 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 2 case distinctions, treesize of input 414 treesize of output 370 [2021-11-23 02:18:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 130 [2021-11-23 02:18:42,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:42,629 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 144 treesize of output 105 [2021-11-23 02:18:42,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,738 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:18:42,739 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 2 case distinctions, treesize of input 131 treesize of output 84 [2021-11-23 02:18:42,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:42,799 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 2 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 02:18:42,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:42,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 02:18:42,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:42,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:46,932 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-23 02:18:46,934 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 36 for LOIs [2021-11-23 02:18:46,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:51,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2028#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:51,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:51,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:18:51,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-23 02:18:51,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661891405] [2021-11-23 02:18:51,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:51,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:18:51,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:18:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3126, Unknown=1, NotChecked=0, Total=3422 [2021-11-23 02:18:51,847 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:18:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:52,799 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-11-23 02:18:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:18:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-11-23 02:18:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:52,802 INFO L225 Difference]: With dead ends: 65 [2021-11-23 02:18:52,802 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 02:18:52,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=330, Invalid=3451, Unknown=1, NotChecked=0, Total=3782 [2021-11-23 02:18:52,804 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:52,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 198 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2021-11-23 02:18:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 02:18:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-23 02:18:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:18:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-23 02:18:52,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2021-11-23 02:18:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:52,815 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-23 02:18:52,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:18:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-23 02:18:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:18:52,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:52,817 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:52,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:18:53,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:53,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 801667564, now seen corresponding path program 5 times [2021-11-23 02:18:53,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:53,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980922033] [2021-11-23 02:18:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:53,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:53,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:18:53,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815391129] [2021-11-23 02:18:53,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:18:53,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:53,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:53,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:18:53,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:18:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:18:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:18:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:18:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:18:53,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980922033] [2021-11-23 02:18:53,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:18:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815391129] [2021-11-23 02:18:53,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815391129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123567678] [2021-11-23 02:18:53,423 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:18:53,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:53,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:53,424 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:53,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:53,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,518 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:18:53,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:18:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,533 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 55 treesize of output 65 [2021-11-23 02:18:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:18:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:53,692 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:18:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 02:18:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:53,760 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:18:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:18:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,085 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 02:18:54,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 02:18:54,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,316 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:18:54,316 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 2 case distinctions, treesize of input 105 treesize of output 66 [2021-11-23 02:18:54,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-11-23 02:18:54,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-11-23 02:18:54,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,633 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 02:18:54,634 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 2 case distinctions, treesize of input 108 treesize of output 69 [2021-11-23 02:18:54,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 183 [2021-11-23 02:18:54,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:54,798 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 264 treesize of output 194 [2021-11-23 02:18:54,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:54,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:18:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 161 [2021-11-23 02:18:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:55,094 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 227 treesize of output 172 [2021-11-23 02:18:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:55,172 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 2 case distinctions, treesize of input 985 treesize of output 737 [2021-11-23 02:18:57,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:18:58,014 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 36 for LOIs [2021-11-23 02:18:58,046 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:59,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2450#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:59,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:59,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:18:59,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 02:18:59,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326533112] [2021-11-23 02:18:59,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:59,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:18:59,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:18:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:18:59,734 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-23 02:19:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:00,014 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-11-23 02:19:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:19:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 37 [2021-11-23 02:19:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:00,032 INFO L225 Difference]: With dead ends: 87 [2021-11-23 02:19:00,032 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 02:19:00,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:19:00,033 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:00,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 106 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:19:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 02:19:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-11-23 02:19:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-23 02:19:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-11-23 02:19:00,050 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 37 [2021-11-23 02:19:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:00,050 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-11-23 02:19:00,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-23 02:19:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-11-23 02:19:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:19:00,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:00,052 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:00,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:00,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:19:00,266 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2143999722, now seen corresponding path program 2 times [2021-11-23 02:19:00,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103705730] [2021-11-23 02:19:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:00,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:00,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:19:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319394907] [2021-11-23 02:19:00,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:19:00,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:00,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:00,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f58c38a-d1e3-4252-83a6-2bcb9089f6f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:19:00,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:19:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:19:00,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 02:19:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:00,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:19:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 15 [2021-11-23 02:19:00,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:19:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:00,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:19:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:01,953 INFO L354 Elim1Store]: treesize reduction 562, result has 21.1 percent of original size [2021-11-23 02:19:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 250 treesize of output 276 [2021-11-23 02:19:02,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:19:02,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:19:02,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:19:02,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:19:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:02,740 INFO L354 Elim1Store]: treesize reduction 22, result has 67.2 percent of original size [2021-11-23 02:19:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 625 treesize of output 457 [2021-11-23 02:19:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,118 INFO L354 Elim1Store]: treesize reduction 867, result has 22.9 percent of original size [2021-11-23 02:19:20,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 530 treesize of output 560 [2021-11-23 02:19:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:19:20,398 INFO L354 Elim1Store]: treesize reduction 96, result has 46.4 percent of original size [2021-11-23 02:19:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 588 treesize of output 484