/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:47:00,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:47:00,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:47:00,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:47:00,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:47:00,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:47:00,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:47:00,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:47:00,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:47:00,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:47:00,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:47:00,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:47:00,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:47:00,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:47:00,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:47:00,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:47:00,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:47:00,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:47:00,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:47:00,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:47:00,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:47:00,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:47:00,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:47:00,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:47:00,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:47:00,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:47:00,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:47:00,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:47:00,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:47:00,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:47:00,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:47:00,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:47:00,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:47:00,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:47:00,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:47:00,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:47:00,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:47:00,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:47:00,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:47:00,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:47:00,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:47:00,514 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:47:00,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:47:00,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:47:00,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:47:00,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:47:00,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:47:00,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:47:00,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:47:00,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:47:00,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:47:00,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:47:00,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:47:00,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:47:00,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:00,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:47:00,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:47:00,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:47:00,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:47:00,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:47:00,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:47:00,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:47:00,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:47:00,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:47:00,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:47:00,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:47:00,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:47:00,946 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:47:00,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_1-2.c [2020-12-23 06:47:01,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/43f864677/6f3f89ffa3f44757996f3e6019662906/FLAGa028f4fa4 [2020-12-23 06:47:01,628 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:47:01,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_1-2.c [2020-12-23 06:47:01,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/43f864677/6f3f89ffa3f44757996f3e6019662906/FLAGa028f4fa4 [2020-12-23 06:47:02,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/43f864677/6f3f89ffa3f44757996f3e6019662906 [2020-12-23 06:47:02,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:47:02,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:47:02,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:02,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:47:02,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:47:02,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447da919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02, skipping insertion in model container [2020-12-23 06:47:02,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:47:02,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:47:02,320 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]] [2020-12-23 06:47:02,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:02,361 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:47:02,377 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 06:47:02,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:02,399 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:47:02,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02 WrapperNode [2020-12-23 06:47:02,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:02,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:02,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:47:02,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:47:02,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:02,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:47:02,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:47:02,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:47:02,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... [2020-12-23 06:47:02,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:47:02,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:47:02,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:47:02,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:47:02,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:47:02,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:47:02,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:47:02,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:47:02,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:47:02,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:47:02,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:47:02,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:47:02,806 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:47:02,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:02 BoogieIcfgContainer [2020-12-23 06:47:02,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:47:02,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:47:02,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:47:02,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:47:02,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:47:02" (1/3) ... [2020-12-23 06:47:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ba6053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:02, skipping insertion in model container [2020-12-23 06:47:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:02" (2/3) ... [2020-12-23 06:47:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ba6053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:02, skipping insertion in model container [2020-12-23 06:47:02,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:02" (3/3) ... [2020-12-23 06:47:02,818 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-12-23 06:47:02,826 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:47:02,831 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:47:02,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:47:02,880 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:47:02,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:47:02,881 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:47:02,881 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:47:02,881 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:47:02,881 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:47:02,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:47:02,882 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:47:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:47:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:47:02,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:02,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:47:02,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-23 06:47:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:02,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334368272] [2020-12-23 06:47:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334368272] [2020-12-23 06:47:03,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:03,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:47:03,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201568663] [2020-12-23 06:47:03,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:47:03,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:47:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:47:03,272 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:47:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:03,304 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 06:47:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:47:03,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:47:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:03,315 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:47:03,316 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:47:03,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:47:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:47:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-23 06:47:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:47:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:47:03,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-23 06:47:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:03,363 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:47:03,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:47:03,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:47:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:47:03,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:03,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:03,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:47:03,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-23 06:47:03,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:03,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225538804] [2020-12-23 06:47:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225538804] [2020-12-23 06:47:03,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888973456] [2020-12-23 06:47:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:47:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:03,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:47:03,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606152032] [2020-12-23 06:47:03,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:47:03,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:47:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:03,575 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-23 06:47:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:03,610 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:47:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:47:03,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:47:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:03,612 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:47:03,612 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:47:03,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:47:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-23 06:47:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:47:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:47:03,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-23 06:47:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:03,623 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:47:03,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:47:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:47:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:47:03,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:03,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:03,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:47:03,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-23 06:47:03,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:03,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804571782] [2020-12-23 06:47:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804571782] [2020-12-23 06:47:03,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601529424] [2020-12-23 06:47:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:03,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:04,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:47:04,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824927188] [2020-12-23 06:47:04,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:47:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:47:04,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:47:04,033 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-23 06:47:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:04,058 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:47:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:47:04,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 06:47:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:04,060 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:47:04,060 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:47:04,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:47:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:47:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-23 06:47:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:47:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:47:04,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-23 06:47:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:04,071 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:47:04,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:47:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:47:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:47:04,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:04,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:04,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,273 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-23 06:47:04,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:04,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086481280] [2020-12-23 06:47:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086481280] [2020-12-23 06:47:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685994644] [2020-12-23 06:47:04,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:47:04,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:04,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,457 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 06:47:04,458 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:04,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:04,466 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:04,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 06:47:04,586 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:04,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:47:04,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:47:04,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-23 06:47:04,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741307719] [2020-12-23 06:47:04,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:47:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:47:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:04,621 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-12-23 06:47:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:06,719 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:47:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:47:06,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 06:47:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:06,720 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:47:06,720 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:47:06,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:47:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:47:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:47:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:47:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:47:06,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-12-23 06:47:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:06,722 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:47:06,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:47:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:47:06,723 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:47:06,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:47:06,967 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:47:06,967 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 06:47:06,967 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:47:06,967 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:47:06,967 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:47:06,968 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-23 06:47:06,968 INFO L189 CegarLoopUtils]: For program point L16-2(lines 16 18) no Hoare annotation was computed. [2020-12-23 06:47:06,968 INFO L185 CegarLoopUtils]: At program point L16-3(lines 16 18) the Hoare annotation is: (or (= ULTIMATE.start_main_~i~0 0) (exists ((v_ULTIMATE.start_main_~i~0_12 Int)) (and (<= ULTIMATE.start_main_~i~0 (+ v_ULTIMATE.start_main_~i~0_12 1)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0.base|) (+ |ULTIMATE.start_main_~#A~0.offset| (* v_ULTIMATE.start_main_~i~0_12 4))) v_ULTIMATE.start_main_~i~0_12) (< v_ULTIMATE.start_main_~i~0_12 1024)))) [2020-12-23 06:47:06,968 INFO L189 CegarLoopUtils]: For program point L16-4(lines 16 18) no Hoare annotation was computed. [2020-12-23 06:47:06,968 INFO L189 CegarLoopUtils]: For program point L12(lines 12 21) no Hoare annotation was computed. [2020-12-23 06:47:06,969 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-23 06:47:06,969 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-12-23 06:47:06,978 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,979 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,980 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,980 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,987 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,988 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,988 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,988 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:06,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:47:06 BoogieIcfgContainer [2020-12-23 06:47:06,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:47:06,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:47:06,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:47:06,992 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:47:06,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:02" (3/4) ... [2020-12-23 06:47:06,996 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:47:07,007 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 06:47:07,008 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:47:07,008 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 06:47:07,008 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:47:07,036 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: i == 0 || (\exists v_ULTIMATE.start_main_~i~0_12 : int :: (i <= v_ULTIMATE.start_main_~i~0_12 + 1 && unknown-#memory_int-unknown[A][A + v_ULTIMATE.start_main_~i~0_12 * 4] == v_ULTIMATE.start_main_~i~0_12) && v_ULTIMATE.start_main_~i~0_12 < 1024) [2020-12-23 06:47:07,046 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/array_1-2.c-witness.graphml [2020-12-23 06:47:07,047 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:47:07,048 INFO L168 Benchmark]: Toolchain (without parser) took 5022.26 ms. Allocated memory is still 177.2 MB. Free memory was 151.3 MB in the beginning and 70.9 MB in the end (delta: 80.4 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,049 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 177.2 MB. Free memory is still 148.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:47:07,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.45 ms. Allocated memory is still 177.2 MB. Free memory was 151.1 MB in the beginning and 141.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 177.2 MB. Free memory was 141.7 MB in the beginning and 140.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,051 INFO L168 Benchmark]: Boogie Preprocessor took 45.81 ms. Allocated memory is still 177.2 MB. Free memory was 140.4 MB in the beginning and 139.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,052 INFO L168 Benchmark]: RCFGBuilder took 319.97 ms. Allocated memory is still 177.2 MB. Free memory was 139.3 MB in the beginning and 127.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,053 INFO L168 Benchmark]: TraceAbstraction took 4181.06 ms. Allocated memory is still 177.2 MB. Free memory was 127.2 MB in the beginning and 73.0 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,054 INFO L168 Benchmark]: Witness Printer took 54.94 ms. Allocated memory is still 177.2 MB. Free memory was 73.0 MB in the beginning and 70.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:07,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 177.2 MB. Free memory is still 148.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 369.45 ms. Allocated memory is still 177.2 MB. Free memory was 151.1 MB in the beginning and 141.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 177.2 MB. Free memory was 141.7 MB in the beginning and 140.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.81 ms. Allocated memory is still 177.2 MB. Free memory was 140.4 MB in the beginning and 139.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 319.97 ms. Allocated memory is still 177.2 MB. Free memory was 139.3 MB in the beginning and 127.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4181.06 ms. Allocated memory is still 177.2 MB. Free memory was 127.2 MB in the beginning and 73.0 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * Witness Printer took 54.94 ms. Allocated memory is still 177.2 MB. Free memory was 73.0 MB in the beginning and 70.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant [2020-12-23 06:47:07,068 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,068 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,068 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,069 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,069 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,069 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,070 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] [2020-12-23 06:47:07,070 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_12,QUANTIFIED] Derived loop invariant: i == 0 || (\exists v_ULTIMATE.start_main_~i~0_12 : int :: (i <= v_ULTIMATE.start_main_~i~0_12 + 1 && unknown-#memory_int-unknown[A][A + v_ULTIMATE.start_main_~i~0_12 * 4] == v_ULTIMATE.start_main_~i~0_12) && v_ULTIMATE.start_main_~i~0_12 < 1024) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 9 SDslu, 31 SDs, 0 SdLazy, 44 SolverSat, 3 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 26 HoareAnnotationTreeSize, 2 FomulaSimplifications, 50 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 66 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 59 ConstructedInterpolants, 2 QuantifiedInterpolants, 1549 SizeOfPredicates, 6 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 9/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...