/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-crafted/simple_vardep_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:47:41,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:47:41,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:47:41,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 16:47:41,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:47:41,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:47:41,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:47:41,970 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 16:47:42,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:47:42,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:47:42,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:47:42,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:47:42,021 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:47:42,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:47:42,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:47:42,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:47:42,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:47:42,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:47:42,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:47:42,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:47:42,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:47:42,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:47:42,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:47:42,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:47:42,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:47:42,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:47:42,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:47:42,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:47:42,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:47:42,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:47:42,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:47:42,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:47:42,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:47:42,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:47:42,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:47:42,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:47:42,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:47:42,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:47:42,481 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:47:42,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_vardep_2.c [2021-01-06 16:47:42,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5d7edf9d/3916ac369b624c9196878ec1d610abd5/FLAG57d573ca2 [2021-01-06 16:47:43,133 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:47:43,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_vardep_2.c [2021-01-06 16:47:43,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5d7edf9d/3916ac369b624c9196878ec1d610abd5/FLAG57d573ca2 [2021-01-06 16:47:43,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5d7edf9d/3916ac369b624c9196878ec1d610abd5 [2021-01-06 16:47:43,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:47:43,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:47:43,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:47:43,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:47:43,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:47:43,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d3df91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43, skipping insertion in model container [2021-01-06 16:47:43,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:47:43,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:47:43,678 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-crafted/simple_vardep_2.c[584,597] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:47:43,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:47:43,702 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:47:43,716 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-crafted/simple_vardep_2.c[584,597] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:47:43,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:47:43,735 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:47:43,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43 WrapperNode [2021-01-06 16:47:43,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:47:43,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:47:43,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:47:43,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:47:43,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:47:43,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:47:43,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:47:43,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:47:43,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (1/1) ... [2021-01-06 16:47:43,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:47:43,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:47:43,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:47:43,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:47:43,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (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 16:47:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:47:43,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:47:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:47:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:47:44,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:47:44,150 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:47:44,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:47:44 BoogieIcfgContainer [2021-01-06 16:47:44,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:47:44,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:47:44,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:47:44,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:47:44,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:47:43" (1/3) ... [2021-01-06 16:47:44,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20847461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:47:44, skipping insertion in model container [2021-01-06 16:47:44,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:47:43" (2/3) ... [2021-01-06 16:47:44,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20847461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:47:44, skipping insertion in model container [2021-01-06 16:47:44,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:47:44" (3/3) ... [2021-01-06 16:47:44,162 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c [2021-01-06 16:47:44,168 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:47:44,173 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:47:44,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:47:44,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:47:44,231 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:47:44,231 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:47:44,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:47:44,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:47:44,232 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:47:44,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:47:44,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:47:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2021-01-06 16:47:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 16:47:44,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:44,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 16:47:44,256 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-01-06 16:47:44,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:44,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204985486] [2021-01-06 16:47:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:44,631 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 16:47:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204985486] [2021-01-06 16:47:44,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:47:44,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:47:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41289935] [2021-01-06 16:47:44,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:47:44,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:47:44,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:47:44,656 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2021-01-06 16:47:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:44,714 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2021-01-06 16:47:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:47:44,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-01-06 16:47:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:44,727 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:47:44,727 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:47:44,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:47:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:47:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:47:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:47:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:47:44,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-01-06 16:47:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:44,766 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:47:44,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:47:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:47:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:47:44,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:44,767 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-01-06 16:47:44,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:47:44,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1810804418, now seen corresponding path program 1 times [2021-01-06 16:47:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:44,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991561262] [2021-01-06 16:47:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991561262] [2021-01-06 16:47:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983559174] [2021-01-06 16:47:44,924 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 [2021-01-06 16:47:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:47:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:45,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:45,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-01-06 16:47:45,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45142560] [2021-01-06 16:47:45,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:47:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:45,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:47:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:47:45,216 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2021-01-06 16:47:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:45,329 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-01-06 16:47:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:47:45,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2021-01-06 16:47:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:45,331 INFO L225 Difference]: With dead ends: 9 [2021-01-06 16:47:45,331 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:47:45,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:47:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:47:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:47:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:47:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:47:45,334 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-01-06 16:47:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:45,334 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:47:45,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:47:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:47:45,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:47:45,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:47:45,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:47:45,661 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:47:45,661 INFO L189 CegarLoopUtils]: For program point L15(lines 15 28) no Hoare annotation was computed. [2021-01-06 16:47:45,661 INFO L189 CegarLoopUtils]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-01-06 16:47:45,662 INFO L185 CegarLoopUtils]: At program point L9-2(lines 7 26) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~j~0 0)) (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0)) (.cse1 (* 3 ULTIMATE.start_main_~i~0))) (and (<= .cse0 ULTIMATE.start_main_~j~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~k~0 .cse1) (<= ULTIMATE.start_main_~j~0 .cse0) (<= .cse1 ULTIMATE.start_main_~k~0)))) [2021-01-06 16:47:45,662 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:47:45,662 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:47:45,662 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:47:45,663 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2021-01-06 16:47:45,663 INFO L189 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-01-06 16:47:45,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:47:45 BoogieIcfgContainer [2021-01-06 16:47:45,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:47:45,681 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:47:45,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:47:45,681 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:47:45,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:47:44" (3/4) ... [2021-01-06 16:47:45,685 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:47:45,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 16:47:45,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:47:45,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:47:45,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:47:45,733 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-crafted/simple_vardep_2.c-witness.graphml [2021-01-06 16:47:45,733 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:47:45,735 INFO L168 Benchmark]: Toolchain (without parser) took 2227.61 ms. Allocated memory is still 165.7 MB. Free memory was 140.7 MB in the beginning and 90.2 MB in the end (delta: 50.5 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,736 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 165.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:47:45,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.08 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 131.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.49 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,739 INFO L168 Benchmark]: Boogie Preprocessor took 21.21 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.7 MB in the end (delta: 966.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,740 INFO L168 Benchmark]: RCFGBuilder took 356.80 ms. Allocated memory is still 165.7 MB. Free memory was 128.7 MB in the beginning and 118.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,740 INFO L168 Benchmark]: TraceAbstraction took 1525.76 ms. Allocated memory is still 165.7 MB. Free memory was 117.8 MB in the beginning and 92.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,741 INFO L168 Benchmark]: Witness Printer took 52.47 ms. Allocated memory is still 165.7 MB. Free memory was 92.3 MB in the beginning and 90.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:47:45,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 165.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.08 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 131.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.49 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.21 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.7 MB in the end (delta: 966.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.80 ms. Allocated memory is still 165.7 MB. Free memory was 128.7 MB in the beginning and 118.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1525.76 ms. Allocated memory is still 165.7 MB. Free memory was 117.8 MB in the beginning and 92.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 8.0 GB. * Witness Printer took 52.47 ms. Allocated memory is still 165.7 MB. Free memory was 92.3 MB in the beginning and 90.2 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: 10]: 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: 7]: Loop Invariant Derived loop invariant: ((i == 0 && k == 0) && j == 0) || ((((2 * i <= j && 1 == cond) && k <= 3 * i) && j <= 2 * i) && 3 * i <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 9 SDslu, 13 SDs, 0 SdLazy, 17 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 1 LocationsWithAnnotation, 1 PreInvPairs, 4 NumberOfFragments, 35 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 21 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 640 SizeOfPredicates, 6 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...