/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-zilu/benchmark51_polynomial.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:10:56,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:10:56,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:10:56,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:10:56,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:10:56,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:10:56,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:10:56,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:10:56,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:10:56,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:10:56,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:10:56,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:10:56,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:10:56,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:10:56,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:10:56,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:10:56,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:10:56,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:10:56,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:10:56,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:10:56,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:10:56,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:10:56,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:10:56,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:10:56,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:10:56,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:10:56,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:10:56,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:10:56,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:10:56,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:10:56,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:10:56,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:10:56,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:10:56,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:10:56,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:10:56,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:10:56,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:10:56,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:10:56,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:10:56,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:10:56,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:10:56,508 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:10:56,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:10:56,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:10:56,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:10:56,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:10:56,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:10:56,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:10:56,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:10:56,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:10:56,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:10:56,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:10:56,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:10:56,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:10:56,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:10:56,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:10:56,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:10:56,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:10:56,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:10:56,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:10:56,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:10:56,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:10:56,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:10:56,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:10:56,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:10:56,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:10:56,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:10:56,918 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:10:56,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i [2021-01-06 17:10:57,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/938c6066d/d6bbd1e95b8049ce900554ba85ab3292/FLAG7443e52ed [2021-01-06 17:10:57,808 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:10:57,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i [2021-01-06 17:10:57,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/938c6066d/d6bbd1e95b8049ce900554ba85ab3292/FLAG7443e52ed [2021-01-06 17:10:58,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/938c6066d/d6bbd1e95b8049ce900554ba85ab3292 [2021-01-06 17:10:58,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:10:58,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:10:58,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:10:58,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:10:58,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:10:58,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f3f7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58, skipping insertion in model container [2021-01-06 17:10:58,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:10:58,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:10:58,341 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-zilu/benchmark51_polynomial.i[872,885] [2021-01-06 17:10:58,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:10:58,379 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:10:58,400 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-zilu/benchmark51_polynomial.i[872,885] [2021-01-06 17:10:58,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:10:58,429 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:10:58,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58 WrapperNode [2021-01-06 17:10:58,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:10:58,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:10:58,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:10:58,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:10:58,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:10:58,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:10:58,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:10:58,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:10:58,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (1/1) ... [2021-01-06 17:10:58,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:10:58,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:10:58,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:10:58,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:10:58,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (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 [2021-01-06 17:10:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:10:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:10:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:10:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:10:59,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:10:59,073 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 17:10:59,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:10:59 BoogieIcfgContainer [2021-01-06 17:10:59,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:10:59,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:10:59,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:10:59,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:10:59,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:10:58" (1/3) ... [2021-01-06 17:10:59,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d8d0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:10:59, skipping insertion in model container [2021-01-06 17:10:59,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:10:58" (2/3) ... [2021-01-06 17:10:59,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d8d0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:10:59, skipping insertion in model container [2021-01-06 17:10:59,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:10:59" (3/3) ... [2021-01-06 17:10:59,086 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark51_polynomial.i [2021-01-06 17:10:59,095 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:10:59,100 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:10:59,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:10:59,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:10:59,231 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:10:59,231 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:10:59,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:10:59,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:10:59,232 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:10:59,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:10:59,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:10:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 17:10:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:10:59,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:59,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:10:59,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1807458887, now seen corresponding path program 1 times [2021-01-06 17:10:59,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:59,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350553736] [2021-01-06 17:10:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:10:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350553736] [2021-01-06 17:10:59,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:10:59,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:10:59,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230942808] [2021-01-06 17:10:59,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:10:59,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:10:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:10:59,489 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2021-01-06 17:10:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:59,508 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-01-06 17:10:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:10:59,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:10:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:59,521 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:10:59,521 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 17:10:59,525 INFO L677 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 [2021-01-06 17:10:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 17:10:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 17:10:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 17:10:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-01-06 17:10:59,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-01-06 17:10:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:59,567 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-01-06 17:10:59,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:10:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-01-06 17:10:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:10:59,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:59,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:10:59,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:10:59,569 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1806982231, now seen corresponding path program 1 times [2021-01-06 17:10:59,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:59,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891600474] [2021-01-06 17:10:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:10:59,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891600474] [2021-01-06 17:10:59,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:10:59,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:10:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658504066] [2021-01-06 17:10:59,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:10:59,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:10:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:10:59,725 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2021-01-06 17:10:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:59,774 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2021-01-06 17:10:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:10:59,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-06 17:10:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:59,775 INFO L225 Difference]: With dead ends: 15 [2021-01-06 17:10:59,775 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:10:59,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:10:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:10:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:10:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:10:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:10:59,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-01-06 17:10:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:59,778 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:10:59,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:10:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:10:59,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:10:59,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:10:59,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:10:59,799 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 17:10:59,799 INFO L189 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2021-01-06 17:10:59,800 INFO L189 CegarLoopUtils]: For program point L21(line 21) no Hoare annotation was computed. [2021-01-06 17:10:59,800 INFO L189 CegarLoopUtils]: For program point L23-2(lines 22 26) no Hoare annotation was computed. [2021-01-06 17:10:59,800 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-01-06 17:10:59,800 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 17:10:59,800 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 17:10:59,801 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 17:10:59,801 INFO L192 CegarLoopUtils]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-01-06 17:10:59,801 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-01-06 17:10:59,802 INFO L185 CegarLoopUtils]: At program point L24-1(lines 22 26) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 50) (<= 0 ULTIMATE.start_main_~x~0)) [2021-01-06 17:10:59,802 INFO L189 CegarLoopUtils]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2021-01-06 17:10:59,802 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-01-06 17:10:59,802 INFO L189 CegarLoopUtils]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-01-06 17:10:59,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:10:59 BoogieIcfgContainer [2021-01-06 17:10:59,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:10:59,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:10:59,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:10:59,822 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:10:59,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:10:59" (3/4) ... [2021-01-06 17:10:59,826 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 17:10:59,838 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 17:10:59,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 17:10:59,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:10:59,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:10:59,886 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-zilu/benchmark51_polynomial.i-witness.graphml [2021-01-06 17:10:59,887 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:10:59,889 INFO L168 Benchmark]: Toolchain (without parser) took 1741.63 ms. Allocated memory is still 159.4 MB. Free memory was 135.2 MB in the beginning and 114.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,890 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 132.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:10:59,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.23 ms. Allocated memory is still 159.4 MB. Free memory was 135.0 MB in the beginning and 125.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.49 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,892 INFO L168 Benchmark]: Boogie Preprocessor took 59.57 ms. Allocated memory is still 159.4 MB. Free memory was 123.6 MB in the beginning and 122.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,893 INFO L168 Benchmark]: RCFGBuilder took 527.20 ms. Allocated memory is still 159.4 MB. Free memory was 122.6 MB in the beginning and 111.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,894 INFO L168 Benchmark]: TraceAbstraction took 743.47 ms. Allocated memory is still 159.4 MB. Free memory was 110.9 MB in the beginning and 117.5 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:10:59,894 INFO L168 Benchmark]: Witness Printer took 65.31 ms. Allocated memory is still 159.4 MB. Free memory was 117.5 MB in the beginning and 114.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:10:59,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 132.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.23 ms. Allocated memory is still 159.4 MB. Free memory was 135.0 MB in the beginning and 125.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.49 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.57 ms. Allocated memory is still 159.4 MB. Free memory was 123.6 MB in the beginning and 122.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 527.20 ms. Allocated memory is still 159.4 MB. Free memory was 122.6 MB in the beginning and 111.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 743.47 ms. Allocated memory is still 159.4 MB. Free memory was 110.9 MB in the beginning and 117.5 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 65.31 ms. Allocated memory is still 159.4 MB. Free memory was 117.5 MB in the beginning and 114.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: x <= 50 && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 3 SDslu, 6 SDs, 0 SdLazy, 8 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 8 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 162 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...