/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/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:05,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:05,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:05,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:05,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:05,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:05,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:05,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:05,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:05,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:05,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:05,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:05,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:05,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:05,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:05,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:05,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:05,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:05,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:05,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:05,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:05,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:05,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:05,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:05,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:05,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:05,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:05,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:05,455 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 13:03:05,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:05,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:05,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:05,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:05,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:05,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:05,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:05,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:05,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:05,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:05,471 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:05,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:05,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:05,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:05,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:05,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:05,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:05,472 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:05,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:05,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:05,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:05,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:05,785 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:05,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-07-07 13:03:05,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf892d2e/b43544d3079f412dbd21aa1665f3feb4/FLAGf84babfd5 [2020-07-07 13:03:06,276 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:06,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-07-07 13:03:06,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf892d2e/b43544d3079f412dbd21aa1665f3feb4/FLAGf84babfd5 [2020-07-07 13:03:06,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf892d2e/b43544d3079f412dbd21aa1665f3feb4 [2020-07-07 13:03:06,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:06,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:06,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:06,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:06,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:06,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f97057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06, skipping insertion in model container [2020-07-07 13:03:06,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:06,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:06,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:06,868 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:06,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:06,899 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:06,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06 WrapperNode [2020-07-07 13:03:06,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:06,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:06,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:06,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:06,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (1/1) ... [2020-07-07 13:03:06,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:06,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:06,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:06,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:06,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (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 13:03:07,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:07,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:07,069 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-07 13:03:07,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:07,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:07,306 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:07,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:07 BoogieIcfgContainer [2020-07-07 13:03:07,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:07,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:07,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:07,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:07,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:06" (1/3) ... [2020-07-07 13:03:07,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a31a003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:07, skipping insertion in model container [2020-07-07 13:03:07,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:06" (2/3) ... [2020-07-07 13:03:07,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a31a003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:07, skipping insertion in model container [2020-07-07 13:03:07,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:07" (3/3) ... [2020-07-07 13:03:07,320 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-07-07 13:03:07,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:07,337 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:07,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:07,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:07,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:07,378 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:07,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:07,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:07,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:07,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:07,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-07 13:03:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 13:03:07,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:07,401 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 13:03:07,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:07,407 INFO L82 PathProgramCache]: Analyzing trace with hash 935018920, now seen corresponding path program 1 times [2020-07-07 13:03:07,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:07,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527153433] [2020-07-07 13:03:07,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:07,761 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 13:03:07,762 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:07,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527153433] [2020-07-07 13:03:07,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:07,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:03:07,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35730158] [2020-07-07 13:03:07,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:03:07,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:03:07,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:03:07,786 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 9 states. [2020-07-07 13:03:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:08,057 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-07-07 13:03:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:03:08,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-07-07 13:03:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:08,070 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:03:08,070 INFO L226 Difference]: Without dead ends: 37 [2020-07-07 13:03:08,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-07 13:03:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-07 13:03:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-07 13:03:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 13:03:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-07 13:03:08,126 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 24 [2020-07-07 13:03:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-07 13:03:08,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:03:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-07 13:03:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 13:03:08,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:08,130 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 13:03:08,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:08,130 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2135506668, now seen corresponding path program 1 times [2020-07-07 13:03:08,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:08,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599393325] [2020-07-07 13:03:08,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:08,225 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 13:03:08,226 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:08,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599393325] [2020-07-07 13:03:08,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:08,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:08,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817144052] [2020-07-07 13:03:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:08,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:08,230 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-07-07 13:03:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:08,330 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-07 13:03:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:03:08,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-07 13:03:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:08,332 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:03:08,332 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 13:03:08,334 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 13:03:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 13:03:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-07 13:03:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 13:03:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-07-07 13:03:08,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-07-07 13:03:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:08,344 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-07-07 13:03:08,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-07-07 13:03:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:03:08,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:08,346 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 13:03:08,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:08,347 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1044754306, now seen corresponding path program 1 times [2020-07-07 13:03:08,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:08,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964029632] [2020-07-07 13:03:08,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:08,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:03:08,369 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:03:08,375 INFO L168 Benchmark]: Toolchain (without parser) took 1690.63 ms. Allocated memory was 145.8 MB in the beginning and 236.5 MB in the end (delta: 90.7 MB). Free memory was 102.9 MB in the beginning and 202.7 MB in the end (delta: -99.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:03:08,376 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 121.1 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:08,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.55 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:08,377 INFO L168 Benchmark]: Boogie Preprocessor took 25.62 ms. Allocated memory is still 145.8 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:08,379 INFO L168 Benchmark]: RCFGBuilder took 385.16 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 167.9 MB in the end (delta: -76.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:08,379 INFO L168 Benchmark]: TraceAbstraction took 1059.41 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 167.3 MB in the beginning and 202.7 MB in the end (delta: -35.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:03:08,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 121.1 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 215.55 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.62 ms. Allocated memory is still 145.8 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.16 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 167.9 MB in the end (delta: -76.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1059.41 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 167.3 MB in the beginning and 202.7 MB in the end (delta: -35.5 MB). There was no memory consumed. 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...