/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-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:07:23,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:07:23,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:07:23,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:07:23,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:07:23,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:07:23,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:07:23,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:07:23,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:07:23,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:07:23,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:07:23,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:07:23,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:07:23,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:07:23,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:07:23,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:07:23,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:07:23,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:07:23,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:07:23,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:07:23,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:07:23,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:07:23,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:07:23,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:07:23,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:07:23,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:07:23,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:07:23,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:07:23,591 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 13:07:23,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:07:23,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:07:23,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:07:23,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:07:23,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:07:23,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:07:23,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:07:23,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:07:23,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:07:23,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:07:23,604 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:07:23,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:07:23,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:07:23,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:07:23,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:07:23,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:07:23,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:07:23,605 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:07:23,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:07:23,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:07:23,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:07:23,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:07:23,884 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:07:23,885 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-07 13:07:23,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3d8a28b/e6163fe6b3ac42c8a0dd1459163cde26/FLAGb145d696c [2020-07-07 13:07:24,411 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:07:24,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-07 13:07:24,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3d8a28b/e6163fe6b3ac42c8a0dd1459163cde26/FLAGb145d696c [2020-07-07 13:07:24,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3d8a28b/e6163fe6b3ac42c8a0dd1459163cde26 [2020-07-07 13:07:24,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:07:24,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:07:24,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:24,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:07:24,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:07:24,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:24" (1/1) ... [2020-07-07 13:07:24,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:24, skipping insertion in model container [2020-07-07 13:07:24,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:24" (1/1) ... [2020-07-07 13:07:24,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:07:24,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:07:25,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:25,016 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:07:25,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:25,048 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:07:25,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25 WrapperNode [2020-07-07 13:07:25,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:25,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:07:25,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:07:25,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:07:25,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (1/1) ... [2020-07-07 13:07:25,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:07:25,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:07:25,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:07:25,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:07:25,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (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 13:07:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:07:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:07:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 13:07:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 13:07:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:07:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:07:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:07:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 13:07:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 13:07:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:07:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:07:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:07:25,428 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:07:25,428 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:07:25,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:25 BoogieIcfgContainer [2020-07-07 13:07:25,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:07:25,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:07:25,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:07:25,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:07:25,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:07:24" (1/3) ... [2020-07-07 13:07:25,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e20c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:25, skipping insertion in model container [2020-07-07 13:07:25,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:25" (2/3) ... [2020-07-07 13:07:25,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e20c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:25, skipping insertion in model container [2020-07-07 13:07:25,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:25" (3/3) ... [2020-07-07 13:07:25,441 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-07 13:07:25,456 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:07:25,464 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:07:25,480 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:07:25,507 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:07:25,507 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:07:25,507 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:07:25,507 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:07:25,508 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:07:25,508 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:07:25,508 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:07:25,508 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:07:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-07 13:07:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:07:25,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:25,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:25,555 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-07 13:07:25,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:25,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897215714] [2020-07-07 13:07:25,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:25,787 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 13:07:25,787 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:25,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897215714] [2020-07-07 13:07:25,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:25,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:25,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503932180] [2020-07-07 13:07:25,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:25,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:25,820 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-07 13:07:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:25,931 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-07 13:07:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:25,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:07:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:25,944 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:07:25,944 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 13:07:25,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:07:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 13:07:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 13:07:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:26,002 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-07 13:07:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:26,003 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:26,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:07:26,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:26,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:26,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:07:26,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-07 13:07:26,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:26,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798352016] [2020-07-07 13:07:26,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:26,070 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 13:07:26,070 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:26,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798352016] [2020-07-07 13:07:26,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:26,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:26,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696337190] [2020-07-07 13:07:26,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:26,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:26,074 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-07 13:07:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:26,156 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 13:07:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:26,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-07 13:07:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:26,161 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:07:26,161 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:07:26,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:07:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:07:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-07 13:07:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:26,192 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-07 13:07:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:26,193 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:26,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:07:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:26,198 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-07-07 13:07:26,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:07:26,199 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-07 13:07:26,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:26,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988464218] [2020-07-07 13:07:26,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:26,233 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:133) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.fastUprAcceleration(Accelerator.java:101) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.accelerateLoop(Accelerator.java:82) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:219) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:07:26,242 INFO L168 Benchmark]: Toolchain (without parser) took 1438.99 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 121.6 MB in the end (delta: -20.3 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,245 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.56 ms. Allocated memory is still 137.4 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,249 INFO L168 Benchmark]: Boogie Preprocessor took 124.38 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 181.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,250 INFO L168 Benchmark]: RCFGBuilder took 259.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 166.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,252 INFO L168 Benchmark]: TraceAbstraction took 803.72 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 121.6 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:26,263 INFO L336 ainManager$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 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.56 ms. Allocated memory is still 137.4 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.38 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 181.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 166.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 803.72 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 121.6 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...