/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_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:07:13,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:07:13,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:07:13,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:07:13,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:07:13,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:07:13,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:07:13,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:07:13,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:07:13,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:07:13,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:07:13,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:07:13,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:07:13,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:07:13,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:07:13,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:07:13,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:07:13,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:07:13,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:07:13,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:07:13,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:07:13,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:07:13,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:07:13,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:07:13,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:07:13,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:07:13,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:07:13,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:07:13,667 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 13:07:13,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:07:13,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:07:13,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:07:13,680 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:07:13,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:07:13,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:07:13,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:07:13,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:07:13,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:07:13,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:07:13,681 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:07:13,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:07:13,681 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:07:13,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:07:13,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:07:13,682 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:07:13,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:07:13,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:07:13,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:07:13,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:07:13,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:07:13,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:07:13,683 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:07:13,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:07:13,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:07:13,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:07:13,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:07:13,977 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:07:13,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-07 13:07:14,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd34bd35c/b59df2f2ceeb4f13a15571d6027596fa/FLAG0711553eb [2020-07-07 13:07:14,487 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:07:14,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-07 13:07:14,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd34bd35c/b59df2f2ceeb4f13a15571d6027596fa/FLAG0711553eb [2020-07-07 13:07:14,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd34bd35c/b59df2f2ceeb4f13a15571d6027596fa [2020-07-07 13:07:14,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:07:14,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:07:14,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:14,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:07:14,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:07:14,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:14" (1/1) ... [2020-07-07 13:07:14,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601a8c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:14, skipping insertion in model container [2020-07-07 13:07:14,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:14" (1/1) ... [2020-07-07 13:07:14,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:07:14,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:07:15,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:15,089 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:07:15,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:15,122 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:07:15,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15 WrapperNode [2020-07-07 13:07:15,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:15,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:07:15,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:07:15,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:07:15,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (1/1) ... [2020-07-07 13:07:15,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:07:15,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:07:15,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:07:15,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:07:15,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (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 13:07:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:07:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:07:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 13:07:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 13:07:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:07:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:07:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:07:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 13:07:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 13:07:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:07:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:07:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:07:15,516 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:07:15,516 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:07:15,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:15 BoogieIcfgContainer [2020-07-07 13:07:15,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:07:15,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:07:15,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:07:15,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:07:15,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:07:14" (1/3) ... [2020-07-07 13:07:15,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676070a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:15, skipping insertion in model container [2020-07-07 13:07:15,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:15" (2/3) ... [2020-07-07 13:07:15,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676070a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:15, skipping insertion in model container [2020-07-07 13:07:15,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:15" (3/3) ... [2020-07-07 13:07:15,529 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-07-07 13:07:15,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:07:15,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:07:15,575 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:07:15,632 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:07:15,632 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:07:15,633 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:07:15,633 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:07:15,633 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:07:15,633 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:07:15,633 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:07:15,633 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:07:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-07 13:07:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:07:15,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:15,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:15,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:15,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-07 13:07:15,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:15,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360936143] [2020-07-07 13:07:15,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:15,894 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 13:07:15,894 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:15,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360936143] [2020-07-07 13:07:15,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:15,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:15,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223397382] [2020-07-07 13:07:15,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:15,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:15,923 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-07 13:07:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:16,092 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-07 13:07:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:16,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:07:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:16,120 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:07:16,121 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 13:07:16,132 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 13:07:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 13:07:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 13:07:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:16,220 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-07 13:07:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:16,221 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:16,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:07:16,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:16,227 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 13:07:16,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:07:16,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-07 13:07:16,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:16,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497325842] [2020-07-07 13:07:16,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:16,356 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 13:07:16,356 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:16,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497325842] [2020-07-07 13:07:16,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:16,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:16,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695082307] [2020-07-07 13:07:16,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:16,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:16,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:16,365 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-07 13:07:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:16,444 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 13:07:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:16,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-07 13:07:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:16,447 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:07:16,448 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 13:07:16,449 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 13:07:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 13:07:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-07 13:07:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:07:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-07 13:07:16,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-07 13:07:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:16,463 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-07 13:07:16,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-07 13:07:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:07:16,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:16,466 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 13:07:16,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:07:16,466 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-07 13:07:16,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:16,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507904744] [2020-07-07 13:07:16,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:16,491 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:07:16,498 INFO L168 Benchmark]: Toolchain (without parser) took 1606.99 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.7 MB in the beginning and 121.2 MB in the end (delta: -18.4 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,499 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.10 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,501 INFO L168 Benchmark]: Boogie Preprocessor took 116.15 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.8 MB in the beginning and 181.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,502 INFO L168 Benchmark]: RCFGBuilder took 281.38 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,503 INFO L168 Benchmark]: TraceAbstraction took 972.35 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 121.2 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:16,507 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.10 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.15 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.8 MB in the beginning and 181.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.38 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 972.35 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 121.2 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...