/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:03,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:03,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:03,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 13:03:03,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:03,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:03,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:03,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:03,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:03,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:03,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:03,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:03,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:03,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:03,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:03,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:03,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:03,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:03,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:03,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:03,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:03:03,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:03,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:03,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:03,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:03,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:03,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:03,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:03,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:03,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:03,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:03,597 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:03,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:03,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:03,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:03,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:03,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:03,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:03,598 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:03,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:03,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:03,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:03,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:03,900 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:03,901 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-07 13:03:03,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ee10619/5372794fd2844b43b93e00e62f37c2dc/FLAG19d37c474 [2020-07-07 13:03:04,384 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:04,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-07 13:03:04,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ee10619/5372794fd2844b43b93e00e62f37c2dc/FLAG19d37c474 [2020-07-07 13:03:04,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ee10619/5372794fd2844b43b93e00e62f37c2dc [2020-07-07 13:03:04,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:04,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:04,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:04,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:04,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:04,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:04" (1/1) ... [2020-07-07 13:03:04,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f8393f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:04, skipping insertion in model container [2020-07-07 13:03:04,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:04" (1/1) ... [2020-07-07 13:03:04,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:04,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:04,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:05,001 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:05,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:05,033 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:05,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05 WrapperNode [2020-07-07 13:03:05,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:05,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:05,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:05,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:05,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (1/1) ... [2020-07-07 13:03:05,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:05,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:05,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:05,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:05,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (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 [2020-07-07 13:03:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-07 13:03:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-07 13:03:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:05,485 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:05,486 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:05,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:05 BoogieIcfgContainer [2020-07-07 13:03:05,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:05,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:05,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:05,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:05,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:04" (1/3) ... [2020-07-07 13:03:05,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f31d07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:05, skipping insertion in model container [2020-07-07 13:03:05,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:05" (2/3) ... [2020-07-07 13:03:05,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f31d07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:05, skipping insertion in model container [2020-07-07 13:03:05,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:05" (3/3) ... [2020-07-07 13:03:05,501 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-07-07 13:03:05,514 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:05,522 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:05,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:05,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:05,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:05,603 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:05,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:05,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:05,604 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:05,604 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:05,604 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-07 13:03:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 13:03:05,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:05,647 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] [2020-07-07 13:03:05,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 935018920, now seen corresponding path program 1 times [2020-07-07 13:03:05,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:05,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717862566] [2020-07-07 13:03:05,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:06,077 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:06,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717862566] [2020-07-07 13:03:06,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:06,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:03:06,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891561301] [2020-07-07 13:03:06,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:03:06,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:06,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:03:06,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:03:06,106 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 8 states. [2020-07-07 13:03:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:06,348 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-07-07 13:03:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:03:06,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-07 13:03:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:06,361 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:03:06,362 INFO L226 Difference]: Without dead ends: 37 [2020-07-07 13:03:06,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:03:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-07 13:03:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-07 13:03:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 13:03:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-07 13:03:06,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 24 [2020-07-07 13:03:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:06,420 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-07 13:03:06,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:03:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-07 13:03:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 13:03:06,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:06,423 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, 1] [2020-07-07 13:03:06,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:06,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2135506668, now seen corresponding path program 1 times [2020-07-07 13:03:06,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:06,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417151790] [2020-07-07 13:03:06,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:06,569 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:06,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417151790] [2020-07-07 13:03:06,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:06,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:06,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428695460] [2020-07-07 13:03:06,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:06,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:06,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:06,573 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-07-07 13:03:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:06,651 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-07 13:03:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:03:06,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-07 13:03:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:06,654 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:03:06,654 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 13:03:06,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 13:03:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-07 13:03:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 13:03:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-07-07 13:03:06,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-07-07 13:03:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:06,666 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-07-07 13:03:06,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-07-07 13:03:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:03:06,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:06,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:06,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:06,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1044754306, now seen corresponding path program 1 times [2020-07-07 13:03:06,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:06,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158634093] [2020-07-07 13:03:06,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:06,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:03:06,691 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:03:06,696 INFO L168 Benchmark]: Toolchain (without parser) took 1906.63 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 101.0 MB in the beginning and 91.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,697 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.35 ms. Allocated memory is still 142.6 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,699 INFO L168 Benchmark]: Boogie Preprocessor took 30.00 ms. Allocated memory is still 142.6 MB. Free memory was 91.2 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,700 INFO L168 Benchmark]: RCFGBuilder took 425.58 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 89.9 MB in the beginning and 164.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,701 INFO L168 Benchmark]: TraceAbstraction took 1201.28 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 91.7 MB in the end (delta: 73.1 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:06,706 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.35 ms. Allocated memory is still 142.6 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.00 ms. Allocated memory is still 142.6 MB. Free memory was 91.2 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.58 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 89.9 MB in the beginning and 164.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1201.28 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 91.7 MB in the end (delta: 73.1 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...