/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:02,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:02,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:02,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:47:02,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:47:02,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:47:02,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:47:02,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:47:02,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:47:02,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:47:02,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:47:02,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:47:02,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:47:02,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:47:02,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:47:02,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:47:02,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:47:02,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:02,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:02,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:02,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:02,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:02,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:02,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:02,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:02,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:02,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:02,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:02,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:02,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:02,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:02,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:02,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:02,671 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:02,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:02,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:02,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:02,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:02,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:02,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:02,673 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:03,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:03,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:03,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:03,120 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:03,121 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:03,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-10-23 21:47:03,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2327b14c4/6ce57746dd2441859abac24b59cb87d6/FLAGdd5780ec9 [2020-10-23 21:47:03,790 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:03,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-10-23 21:47:03,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2327b14c4/6ce57746dd2441859abac24b59cb87d6/FLAGdd5780ec9 [2020-10-23 21:47:04,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2327b14c4/6ce57746dd2441859abac24b59cb87d6 [2020-10-23 21:47:04,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:04,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:04,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:04,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:04,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:04,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d2bd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04, skipping insertion in model container [2020-10-23 21:47:04,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:04,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:04,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:04,384 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:04,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:04,418 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:04,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04 WrapperNode [2020-10-23 21:47:04,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:04,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:04,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:04,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:04,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... [2020-10-23 21:47:04,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:04,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:04,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:04,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:04,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 21:47:04,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-23 21:47:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-23 21:47:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:04,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:04,782 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:47:04,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:04 BoogieIcfgContainer [2020-10-23 21:47:04,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:04,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:04,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:04,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:04,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:04" (1/3) ... [2020-10-23 21:47:04,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66da7b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:04, skipping insertion in model container [2020-10-23 21:47:04,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:04" (2/3) ... [2020-10-23 21:47:04,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66da7b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:04, skipping insertion in model container [2020-10-23 21:47:04,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:04" (3/3) ... [2020-10-23 21:47:04,797 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2020-10-23 21:47:04,814 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:04,827 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:04,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:04,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:04,921 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:04,921 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:04,922 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:04,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:04,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:04,922 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:04,922 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 21:47:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 21:47:04,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:04,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:04,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 836199736, now seen corresponding path program 1 times [2020-10-23 21:47:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:04,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081968091] [2020-10-23 21:47:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:05,058 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:05,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081968091] [2020-10-23 21:47:05,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:05,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566315291] [2020-10-23 21:47:05,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:05,322 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-23 21:47:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:05,453 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-23 21:47:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:05,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-23 21:47:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:05,466 INFO L225 Difference]: With dead ends: 52 [2020-10-23 21:47:05,466 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 21:47:05,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 21:47:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-23 21:47:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 21:47:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-23 21:47:05,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 19 [2020-10-23 21:47:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:05,530 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-23 21:47:05,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-23 21:47:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 21:47:05,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:05,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:05,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:05,534 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash -80945063, now seen corresponding path program 1 times [2020-10-23 21:47:05,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:05,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421390653] [2020-10-23 21:47:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:05,543 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 21:47:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:05,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421390653] [2020-10-23 21:47:05,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:05,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:47:05,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413171600] [2020-10-23 21:47:05,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:47:05,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:05,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:47:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:47:05,728 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2020-10-23 21:47:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:05,944 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-23 21:47:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:47:05,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-23 21:47:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:05,946 INFO L225 Difference]: With dead ends: 27 [2020-10-23 21:47:05,946 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 21:47:05,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 21:47:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 21:47:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 21:47:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 21:47:05,950 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-23 21:47:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:05,951 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 21:47:05,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:47:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 21:47:05,951 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 21:47:05,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:05,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 21:47:06,493 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-23 21:47:06,494 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 21:47:06,494 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-23 21:47:06,494 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-23 21:47:06,494 INFO L270 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,495 INFO L270 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,495 INFO L270 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,495 INFO L270 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,495 INFO L270 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,495 INFO L270 CegarLoopResult]: At program point L3-5(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,496 INFO L270 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (= ~x~0 0) [2020-10-23 21:47:06,496 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~x~0 |old(~x~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 21:47:06,496 INFO L270 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,496 INFO L270 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-10-23 21:47:06,496 INFO L270 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (= ~x~0 0) [2020-10-23 21:47:06,497 INFO L270 CegarLoopResult]: At program point evalENTRY(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,497 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,500 INFO L270 CegarLoopResult]: At program point L16-1(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,500 INFO L270 CegarLoopResult]: At program point evalEXIT(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,500 INFO L270 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2020-10-23 21:47:06,501 INFO L270 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (= ~x~0 0) [2020-10-23 21:47:06,501 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 21:47:06,501 INFO L270 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2020-10-23 21:47:06,501 INFO L270 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-10-23 21:47:06,501 INFO L270 CegarLoopResult]: At program point L29(lines 24 35) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,501 INFO L270 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,502 INFO L270 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-10-23 21:47:06,502 INFO L270 CegarLoopResult]: At program point L26-1(lines 26 30) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-10-23 21:47:06,502 INFO L270 CegarLoopResult]: At program point mainEXIT(lines 24 35) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-10-23 21:47:06,502 INFO L270 CegarLoopResult]: At program point mainFINAL(lines 24 35) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-10-23 21:47:06,502 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-23 21:47:06,503 INFO L270 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-23 21:47:06,503 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2020-10-23 21:47:06,503 INFO L270 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-23 21:47:06,503 INFO L270 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2020-10-23 21:47:06,503 INFO L270 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-23 21:47:06,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:47:06 BoogieIcfgContainer [2020-10-23 21:47:06,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:47:06,525 INFO L168 Benchmark]: Toolchain (without parser) took 2357.78 ms. Allocated memory is still 168.8 MB. Free memory was 146.1 MB in the beginning and 95.7 MB in the end (delta: 50.4 MB). Peak memory consumption was 50.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:06,526 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 99.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:47:06,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.69 ms. Allocated memory is still 168.8 MB. Free memory was 145.4 MB in the beginning and 136.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:06,528 INFO L168 Benchmark]: Boogie Preprocessor took 34.66 ms. Allocated memory is still 168.8 MB. Free memory was 136.3 MB in the beginning and 135.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:06,529 INFO L168 Benchmark]: RCFGBuilder took 328.95 ms. Allocated memory is still 168.8 MB. Free memory was 134.9 MB in the beginning and 147.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:06,530 INFO L168 Benchmark]: TraceAbstraction took 1735.48 ms. Allocated memory is still 168.8 MB. Free memory was 147.3 MB in the beginning and 95.7 MB in the end (delta: 51.7 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:06,533 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 125.8 MB. Free memory is still 99.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.69 ms. Allocated memory is still 168.8 MB. Free memory was 145.4 MB in the beginning and 136.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.66 ms. Allocated memory is still 168.8 MB. Free memory was 136.3 MB in the beginning and 135.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.95 ms. Allocated memory is still 168.8 MB. Free memory was 134.9 MB in the beginning and 147.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1735.48 ms. Allocated memory is still 168.8 MB. Free memory was 147.3 MB in the beginning and 95.7 MB in the end (delta: 51.7 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for eval Derived contract for procedure eval: x == \old(x) || !(\old(x) == 0) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: !(\old(x) == 0) - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (!(x == 0) || \old(cond) == 0) || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 34 SDslu, 45 SDs, 0 SdLazy, 40 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 56 PreInvPairs, 63 NumberOfFragments, 199 HoareAnnotationTreeSize, 56 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 409 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...