/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-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:57:12,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:57:12,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:57:12,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:57:12,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:57:12,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:57:12,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:57:12,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:57:13,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:57:13,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:57:13,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:57:13,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:57:13,048 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:57:13,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:57:13,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:57:13,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:57:13,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:57:13,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:57:13,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:57:13,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:57:13,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:57:13,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:57:13,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:57:13,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:57:13,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:57:13,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:57:13,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:57:13,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:57:13,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:57:13,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:57:13,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:57:13,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:57:13,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:57:13,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:57:13,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:57:13,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:57:13,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:57:13,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:57:13,482 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:57:13,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gsv2008.i [2020-12-23 06:57:13,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9f29f27a/7c93bfb6d44249e8ac2139801f56c944/FLAG1bb2cba80 [2020-12-23 06:57:14,373 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:57:14,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.i [2020-12-23 06:57:14,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9f29f27a/7c93bfb6d44249e8ac2139801f56c944/FLAG1bb2cba80 [2020-12-23 06:57:14,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9f29f27a/7c93bfb6d44249e8ac2139801f56c944 [2020-12-23 06:57:14,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:57:14,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:57:14,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:14,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:57:14,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:57:14,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d6568a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14, skipping insertion in model container [2020-12-23 06:57:14,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:57:14,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:57:14,626 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-lit/gsv2008.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:57:14,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:14,662 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:57:14,682 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-lit/gsv2008.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:57:14,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:14,711 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:57:14,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14 WrapperNode [2020-12-23 06:57:14,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:14,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:14,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:57:14,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:57:14,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:14,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:57:14,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:57:14,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:57:14,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... [2020-12-23 06:57:14,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:57:14,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:57:14,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:57:14,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:57:14,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:57:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:57:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:57:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:57:14,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:57:15,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:57:15,274 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:57:15,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:15 BoogieIcfgContainer [2020-12-23 06:57:15,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:57:15,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:57:15,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:57:15,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:57:15,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:57:14" (1/3) ... [2020-12-23 06:57:15,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3859349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:15, skipping insertion in model container [2020-12-23 06:57:15,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:14" (2/3) ... [2020-12-23 06:57:15,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3859349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:15, skipping insertion in model container [2020-12-23 06:57:15,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:15" (3/3) ... [2020-12-23 06:57:15,287 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-12-23 06:57:15,295 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:57:15,300 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:57:15,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:57:15,351 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:57:15,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:57:15,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:57:15,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:57:15,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:57:15,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:57:15,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:57:15,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:57:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:57:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:57:15,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:15,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:15,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089480, now seen corresponding path program 1 times [2020-12-23 06:57:15,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:15,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460964138] [2020-12-23 06:57:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:15,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460964138] [2020-12-23 06:57:15,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:15,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:57:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096745918] [2020-12-23 06:57:15,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:57:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:57:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:57:15,639 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 06:57:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:15,657 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 06:57:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:57:15,659 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 06:57:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:15,683 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:57:15,683 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:57:15,687 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 06:57:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:57:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:57:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:57:15,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:57:15,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2020-12-23 06:57:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:15,727 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:57:15,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:57:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:57:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:57:15,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:15,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:15,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:57:15,729 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970316, now seen corresponding path program 1 times [2020-12-23 06:57:15,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:15,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120008779] [2020-12-23 06:57:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:15,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120008779] [2020-12-23 06:57:15,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:15,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:57:15,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880662418] [2020-12-23 06:57:15,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:57:15,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:57:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:57:15,864 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2020-12-23 06:57:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:15,896 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:57:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:57:15,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 06:57:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:15,898 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:57:15,898 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:57:15,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:57:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:57:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:57:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:57:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:57:15,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:57:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:15,909 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:57:15,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:57:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:57:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:57:15,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:15,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:15,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:57:15,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 183170324, now seen corresponding path program 1 times [2020-12-23 06:57:15,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:15,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642611255] [2020-12-23 06:57:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642611255] [2020-12-23 06:57:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390287566] [2020-12-23 06:57:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:57:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:16,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:57:16,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985912459] [2020-12-23 06:57:16,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:57:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:16,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:57:16,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:57:16,177 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2020-12-23 06:57:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:16,233 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 06:57:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:57:16,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-12-23 06:57:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:16,235 INFO L225 Difference]: With dead ends: 14 [2020-12-23 06:57:16,235 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:57:16,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:57:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:57:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:57:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:57:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:57:16,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 06:57:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:16,240 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:57:16,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:57:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:57:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:57:16,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:16,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:16,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:57:16,449 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1384978124, now seen corresponding path program 2 times [2020-12-23 06:57:16,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:16,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979838950] [2020-12-23 06:57:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979838950] [2020-12-23 06:57:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660078293] [2020-12-23 06:57:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:16,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:57:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:16,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:57:16,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603064332] [2020-12-23 06:57:16,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:57:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:57:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:57:16,664 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2020-12-23 06:57:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:16,732 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:57:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:57:16,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-23 06:57:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:16,733 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:57:16,733 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:57:16,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:57:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:57:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:57:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:57:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:57:16,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-23 06:57:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:16,741 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:57:16,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:57:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:57:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:57:16,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:16,743 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:16,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:16,962 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:16,964 INFO L82 PathProgramCache]: Analyzing trace with hash -13685740, now seen corresponding path program 3 times [2020-12-23 06:57:16,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:16,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790415573] [2020-12-23 06:57:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:57:17,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790415573] [2020-12-23 06:57:17,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:17,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:57:17,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140996579] [2020-12-23 06:57:17,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:57:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:57:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:57:17,042 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-12-23 06:57:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:17,114 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-23 06:57:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:57:17,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 06:57:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:17,116 INFO L225 Difference]: With dead ends: 11 [2020-12-23 06:57:17,116 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:57:17,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:57:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:57:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:57:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:57:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:57:17,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-23 06:57:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:17,120 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:57:17,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:57:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:57:17,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:57:17,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:57:17,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:57:17,149 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:57:17,149 INFO L185 CegarLoopUtils]: At program point L29-2(lines 29 32) the Hoare annotation is: (or (<= (+ ULTIMATE.start_main_~x~0 2) ULTIMATE.start_main_~y~0) (<= (+ ULTIMATE.start_main_~x~0 50) 0)) [2020-12-23 06:57:17,149 INFO L189 CegarLoopUtils]: For program point L29-3(lines 29 32) no Hoare annotation was computed. [2020-12-23 06:57:17,150 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-23 06:57:17,150 INFO L192 CegarLoopUtils]: At program point L34(lines 24 35) the Hoare annotation is: true [2020-12-23 06:57:17,150 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:57:17,150 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:57:17,150 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:57:17,150 INFO L189 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2020-12-23 06:57:17,151 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-23 06:57:17,151 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-23 06:57:17,151 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-12-23 06:57:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:57:17 BoogieIcfgContainer [2020-12-23 06:57:17,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:57:17,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:57:17,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:57:17,170 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:57:17,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:15" (3/4) ... [2020-12-23 06:57:17,175 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:57:17,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-23 06:57:17,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:57:17,187 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:57:17,187 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:57:17,230 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/gsv2008.i-witness.graphml [2020-12-23 06:57:17,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:57:17,233 INFO L168 Benchmark]: Toolchain (without parser) took 2828.70 ms. Allocated memory is still 172.0 MB. Free memory was 146.4 MB in the beginning and 76.8 MB in the end (delta: 69.7 MB). Peak memory consumption was 71.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,233 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 172.0 MB. Free memory is still 143.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:57:17,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.47 ms. Allocated memory is still 172.0 MB. Free memory was 146.2 MB in the beginning and 136.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 172.0 MB. Free memory was 136.6 MB in the beginning and 135.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,236 INFO L168 Benchmark]: Boogie Preprocessor took 43.57 ms. Allocated memory is still 172.0 MB. Free memory was 135.2 MB in the beginning and 134.3 MB in the end (delta: 940.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,236 INFO L168 Benchmark]: RCFGBuilder took 469.01 ms. Allocated memory is still 172.0 MB. Free memory was 134.3 MB in the beginning and 123.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,237 INFO L168 Benchmark]: TraceAbstraction took 1890.41 ms. Allocated memory is still 172.0 MB. Free memory was 123.0 MB in the beginning and 78.8 MB in the end (delta: 44.2 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,238 INFO L168 Benchmark]: Witness Printer took 60.99 ms. Allocated memory is still 172.0 MB. Free memory was 78.8 MB in the beginning and 76.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:57:17,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 172.0 MB. Free memory is still 143.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 308.47 ms. Allocated memory is still 172.0 MB. Free memory was 146.2 MB in the beginning and 136.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 172.0 MB. Free memory was 136.6 MB in the beginning and 135.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.57 ms. Allocated memory is still 172.0 MB. Free memory was 135.2 MB in the beginning and 134.3 MB in the end (delta: 940.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 469.01 ms. Allocated memory is still 172.0 MB. Free memory was 134.3 MB in the beginning and 123.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1890.41 ms. Allocated memory is still 172.0 MB. Free memory was 123.0 MB in the beginning and 78.8 MB in the end (delta: 44.2 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. * Witness Printer took 60.99 ms. Allocated memory is still 172.0 MB. Free memory was 78.8 MB in the beginning and 76.8 MB in the end (delta: 2.0 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: 19]: 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: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: x + 2 <= y || x + 50 <= 0 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 9 SDslu, 41 SDs, 0 SdLazy, 71 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 13 HoareAnnotationTreeSize, 3 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 1099 SizeOfPredicates, 6 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/14 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...