/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/benchmark35_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:16:32,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:16:32,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:16:32,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 07:16:33,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:16:33,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:16:33,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:16:33,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:16:33,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:16:33,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:16:33,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:16:33,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:16:33,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:16:33,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:16:33,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:16:33,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:16:33,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:16:33,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:16:33,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:16:33,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:16:33,094 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 07:16:33,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:16:33,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:16:33,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:16:33,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:16:33,134 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:16:33,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:16:33,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:16:33,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:16:33,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:16:33,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:16:33,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:16:33,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:16:33,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:16:33,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:16:33,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:16:33,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:16:33,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:16:33,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:16:33,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:16:33,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:16:33,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:16:33,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:16:33,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:16:33,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:16:33,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:16:33,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:16:33,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:16:33,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:16:33,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:16:33,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:16:33,546 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:16:33,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark35_linear.i [2020-12-23 07:16:33,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215407344/d7edfd6c5b824ddfaec07b2991b2cc18/FLAG1ee3ed3a7 [2020-12-23 07:16:34,166 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:16:34,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark35_linear.i [2020-12-23 07:16:34,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215407344/d7edfd6c5b824ddfaec07b2991b2cc18/FLAG1ee3ed3a7 [2020-12-23 07:16:34,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215407344/d7edfd6c5b824ddfaec07b2991b2cc18 [2020-12-23 07:16:34,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:16:34,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:16:34,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:16:34,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:16:34,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:16:34,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c43c441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34, skipping insertion in model container [2020-12-23 07:16:34,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:16:34,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:16:34,705 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/benchmark35_linear.i[868,881] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:16:34,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:16:34,727 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:16:34,742 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/benchmark35_linear.i[868,881] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:16:34,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:16:34,761 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:16:34,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34 WrapperNode [2020-12-23 07:16:34,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:16:34,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:16:34,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:16:34,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:16:34,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:16:34,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:16:34,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:16:34,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:16:34,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (1/1) ... [2020-12-23 07:16:34,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:16:34,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:16:34,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:16:34,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:16:34,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (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 07:16:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:16:34,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:16:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:16:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:16:35,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:16:35,220 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:16:35,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:16:35 BoogieIcfgContainer [2020-12-23 07:16:35,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:16:35,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:16:35,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:16:35,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:16:35,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:16:34" (1/3) ... [2020-12-23 07:16:35,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ec158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:16:35, skipping insertion in model container [2020-12-23 07:16:35,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:34" (2/3) ... [2020-12-23 07:16:35,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ec158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:16:35, skipping insertion in model container [2020-12-23 07:16:35,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:16:35" (3/3) ... [2020-12-23 07:16:35,232 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark35_linear.i [2020-12-23 07:16:35,238 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:16:35,243 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:16:35,262 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:16:35,290 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:16:35,290 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:16:35,290 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:16:35,291 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:16:35,291 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:16:35,291 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:16:35,291 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:16:35,291 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:16:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 07:16:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:16:35,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:35,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:35,312 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2020-12-23 07:16:35,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:35,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036468623] [2020-12-23 07:16:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:35,465 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 07:16:35,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036468623] [2020-12-23 07:16:35,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:35,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:16:35,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114279746] [2020-12-23 07:16:35,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:16:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:16:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:16:35,490 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 07:16:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:35,506 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 07:16:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:16:35,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:16:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:35,516 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:16:35,517 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 07:16:35,520 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 [2020-12-23 07:16:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 07:16:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 07:16:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 07:16:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 07:16:35,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2020-12-23 07:16:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:35,554 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 07:16:35,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:16:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 07:16:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:16:35,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:35,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:35,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:16:35,556 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2020-12-23 07:16:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:35,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318854232] [2020-12-23 07:16:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:35,650 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 07:16:35,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318854232] [2020-12-23 07:16:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:35,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:16:35,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259686721] [2020-12-23 07:16:35,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:16:35,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:16:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:16:35,654 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 07:16:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:35,687 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-12-23 07:16:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:16:35,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 07:16:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:35,687 INFO L225 Difference]: With dead ends: 8 [2020-12-23 07:16:35,687 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 07:16:35,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:16:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 07:16:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 07:16:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 07:16:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 07:16:35,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-12-23 07:16:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:35,690 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 07:16:35,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:16:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 07:16:35,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 07:16:35,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:16:35,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 07:16:35,708 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 07:16:35,708 INFO L189 CegarLoopUtils]: For program point L21(line 21) no Hoare annotation was computed. [2020-12-23 07:16:35,708 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-23 07:16:35,708 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 07:16:35,708 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 07:16:35,709 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 07:16:35,709 INFO L192 CegarLoopUtils]: At program point L26(lines 19 27) the Hoare annotation is: true [2020-12-23 07:16:35,709 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-23 07:16:35,709 INFO L185 CegarLoopUtils]: At program point L22-2(lines 22 24) the Hoare annotation is: (< 0 (+ ULTIMATE.start_main_~x~0 1)) [2020-12-23 07:16:35,710 INFO L189 CegarLoopUtils]: For program point L22-3(lines 22 24) no Hoare annotation was computed. [2020-12-23 07:16:35,710 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-23 07:16:35,710 INFO L189 CegarLoopUtils]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-12-23 07:16:35,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:16:35 BoogieIcfgContainer [2020-12-23 07:16:35,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:16:35,730 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:16:35,730 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:16:35,731 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:16:35,731 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:16:35" (3/4) ... [2020-12-23 07:16:35,735 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 07:16:35,748 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-23 07:16:35,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 07:16:35,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:16:35,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:16:35,820 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-zilu/benchmark35_linear.i-witness.graphml [2020-12-23 07:16:35,820 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:16:35,826 INFO L168 Benchmark]: Toolchain (without parser) took 1312.66 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 96.1 MB in the end (delta: 37.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,829 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:16:35,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.64 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 124.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.99 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 122.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,833 INFO L168 Benchmark]: Boogie Preprocessor took 34.90 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 135.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,834 INFO L168 Benchmark]: RCFGBuilder took 386.30 ms. Allocated memory is still 151.0 MB. Free memory was 135.3 MB in the beginning and 124.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,838 INFO L168 Benchmark]: TraceAbstraction took 505.45 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 98.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,842 INFO L168 Benchmark]: Witness Printer took 89.86 ms. Allocated memory is still 151.0 MB. Free memory was 98.2 MB in the beginning and 96.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:16:35,857 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 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.64 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 124.1 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 35.99 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 122.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.90 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 135.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 386.30 ms. Allocated memory is still 151.0 MB. Free memory was 135.3 MB in the beginning and 124.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 505.45 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 98.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * Witness Printer took 89.86 ms. Allocated memory is still 151.0 MB. Free memory was 98.2 MB in the beginning and 96.1 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.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: 0 < x + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 3 SDslu, 4 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 3 NumberOfFragments, 6 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, 126 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...