/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_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:07:18,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:07:18,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:07:18,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:07:18,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:07:18,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:07:18,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:07:18,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:07:18,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:07:18,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:07:18,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:07:18,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:07:18,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:07:18,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:07:18,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:07:18,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:07:18,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:07:18,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:07:18,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:07:18,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:07:18,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:07:18,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:07:18,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:07:18,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:07:18,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:07:18,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:07:18,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:07:18,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:07:18,690 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 13:07:18,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:07:18,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:07:18,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:07:18,701 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:07:18,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:07:18,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:07:18,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:07:18,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:07:18,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:07:18,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:07:18,702 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:07:18,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:07:18,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:07:18,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:07:18,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:07:18,703 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:07:18,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:07:18,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:07:18,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:07:18,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:07:18,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:07:18,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:07:18,705 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:07:18,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:07:18,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:07:18,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:07:18,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:07:18,987 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:07:18,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-07 13:07:19,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643028f3c/1e0e4093f9264c468537b53fbbfc5f8d/FLAG08b6e2c17 [2020-07-07 13:07:19,562 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:07:19,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-07 13:07:19,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643028f3c/1e0e4093f9264c468537b53fbbfc5f8d/FLAG08b6e2c17 [2020-07-07 13:07:19,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643028f3c/1e0e4093f9264c468537b53fbbfc5f8d [2020-07-07 13:07:19,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:07:19,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:07:19,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:19,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:07:19,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:07:19,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:19" (1/1) ... [2020-07-07 13:07:19,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c68df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:19, skipping insertion in model container [2020-07-07 13:07:19,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:19" (1/1) ... [2020-07-07 13:07:19,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:07:20,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:07:20,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:20,168 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:07:20,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:20,200 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:07:20,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20 WrapperNode [2020-07-07 13:07:20,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:20,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:07:20,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:07:20,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:07:20,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (1/1) ... [2020-07-07 13:07:20,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:07:20,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:07:20,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:07:20,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:07:20,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (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 13:07:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:07:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:07:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 13:07:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 13:07:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:07:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:07:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:07:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 13:07:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 13:07:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:07:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:07:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:07:20,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:07:20,596 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:07:20,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:20 BoogieIcfgContainer [2020-07-07 13:07:20,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:07:20,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:07:20,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:07:20,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:07:20,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:07:19" (1/3) ... [2020-07-07 13:07:20,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11225a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:20, skipping insertion in model container [2020-07-07 13:07:20,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:20" (2/3) ... [2020-07-07 13:07:20,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11225a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:20, skipping insertion in model container [2020-07-07 13:07:20,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:20" (3/3) ... [2020-07-07 13:07:20,609 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-07 13:07:20,620 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:07:20,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:07:20,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:07:20,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:07:20,705 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:07:20,706 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:07:20,706 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:07:20,706 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:07:20,708 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:07:20,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:07:20,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:07:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-07 13:07:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:07:20,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:20,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:20,764 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-07 13:07:20,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:20,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945347381] [2020-07-07 13:07:20,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:20,976 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 13:07:20,976 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:20,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945347381] [2020-07-07 13:07:20,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:20,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:20,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211899174] [2020-07-07 13:07:20,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:20,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:20,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:21,000 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-07 13:07:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:21,124 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-07 13:07:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:21,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:07:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:21,138 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:07:21,139 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 13:07:21,143 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 13:07:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 13:07:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 13:07:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:21,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-07 13:07:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:21,199 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:21,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:07:21,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:21,202 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 13:07:21,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:07:21,203 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-07 13:07:21,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:21,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106730380] [2020-07-07 13:07:21,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:21,264 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 13:07:21,265 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:21,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106730380] [2020-07-07 13:07:21,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:21,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:21,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113795307] [2020-07-07 13:07:21,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:21,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:21,269 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-07 13:07:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:21,344 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 13:07:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:21,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-07 13:07:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:21,347 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:07:21,348 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:07:21,349 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 13:07:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:07:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-07 13:07:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:21,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-07 13:07:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:21,364 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:21,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:07:21,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:21,366 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 13:07:21,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:07:21,367 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-07 13:07:21,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:21,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913519048] [2020-07-07 13:07:21,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:21,391 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:07:21,397 INFO L168 Benchmark]: Toolchain (without parser) took 1424.81 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 103.8 MB in the beginning and 122.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,398 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.38 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,400 INFO L168 Benchmark]: Boogie Preprocessor took 123.23 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 182.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,401 INFO L168 Benchmark]: RCFGBuilder took 276.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 168.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,402 INFO L168 Benchmark]: TraceAbstraction took 792.01 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 122.7 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:21,406 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.38 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.23 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 182.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 168.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 792.01 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 122.7 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 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...