/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/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:52:51,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:52:51,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:52:51,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:52:51,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:52:51,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:52:51,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:52:51,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:52:51,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:52:51,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:52:51,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:52:51,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:52:51,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:52:51,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:52:51,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:52:51,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:52:51,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:52:51,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:52:51,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:52:51,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:52:51,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:52:51,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:52:51,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:52:51,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:52:51,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 14:52:51,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 14:52:51,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 14:52:51,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 14:52:51,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 14:52:51,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 14:52:51,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 14:52:51,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 14:52:51,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 14:52:51,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 14:52:51,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 14:52:51,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 14:52:51,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 14:52:51,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 14:52:51,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:52:51,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:52:51,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:52:51,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:52:51,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:52:51,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:52:51,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:52:51,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:52:51,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:52:51,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:52:51,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:52:51,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:52:51,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:52:51,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:52:51,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:52:51,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:52:51,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:52:51,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:52:51,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:52:51,380 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:52:51,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:52:51,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:52:51,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:52:51,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:52:51,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:52:51,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:52:51,381 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:52:51,685 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:52:51,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:52:51,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:52:51,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:52:51,708 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:52:51,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-17 14:52:51,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24cdb7ea/b18343ae3bbb4056807b5e57ce02f370/FLAGff787b955 [2020-07-17 14:52:52,183 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:52:52,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-17 14:52:52,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24cdb7ea/b18343ae3bbb4056807b5e57ce02f370/FLAGff787b955 [2020-07-17 14:52:52,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24cdb7ea/b18343ae3bbb4056807b5e57ce02f370 [2020-07-17 14:52:52,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:52:52,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:52:52,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:52:52,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:52:52,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:52:52,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:52,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9acff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52, skipping insertion in model container [2020-07-17 14:52:52,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:52,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:52:52,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:52:52,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:52:52,868 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:52:52,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:52:52,905 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:52:52,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52 WrapperNode [2020-07-17 14:52:52,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:52:52,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:52:52,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:52:52,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:52:53,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (1/1) ... [2020-07-17 14:52:53,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:52:53,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:52:53,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:52:53,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:52:53,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (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 [2020-07-17 14:52:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:52:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:52:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:52:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-17 14:52:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:52:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:52:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:52:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 14:52:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-07-17 14:52:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 14:52:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 14:52:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 14:52:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:52:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:52:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 14:52:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:52:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:52:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:52:53,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:52:53,502 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 14:52:53,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:52:53 BoogieIcfgContainer [2020-07-17 14:52:53,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:52:53,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:52:53,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:52:53,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:52:53,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:52:52" (1/3) ... [2020-07-17 14:52:53,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2fb5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:52:53, skipping insertion in model container [2020-07-17 14:52:53,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:52:52" (2/3) ... [2020-07-17 14:52:53,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2fb5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:52:53, skipping insertion in model container [2020-07-17 14:52:53,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:52:53" (3/3) ... [2020-07-17 14:52:53,516 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-07-17 14:52:53,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:52:53,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:52:53,551 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:52:53,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:52:53,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:52:53,576 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:52:53,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:52:53,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:52:53,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:52:53,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:52:53,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:52:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-07-17 14:52:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 14:52:53,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:52:53,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:52:53,607 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:52:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:52:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-07-17 14:52:53,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:52:53,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852976840] [2020-07-17 14:52:53,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:52:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:52:53,872 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:52:53,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852976840] [2020-07-17 14:52:53,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:52:53,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 14:52:53,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417029788] [2020-07-17 14:52:53,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 14:52:53,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:52:53,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 14:52:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 14:52:53,917 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-07-17 14:52:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:52:54,141 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-07-17 14:52:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 14:52:54,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-17 14:52:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:52:54,154 INFO L225 Difference]: With dead ends: 94 [2020-07-17 14:52:54,155 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 14:52:54,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:52:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 14:52:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-07-17 14:52:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-17 14:52:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-07-17 14:52:54,211 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-07-17 14:52:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:52:54,212 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-07-17 14:52:54,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 14:52:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-07-17 14:52:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 14:52:54,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:52:54,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:52:54,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:52:54,215 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:52:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:52:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-07-17 14:52:54,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:52:54,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125246497] [2020-07-17 14:52:54,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:52:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:52:54,439 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:52:54,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125246497] [2020-07-17 14:52:54,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:52:54,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 14:52:54,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299900062] [2020-07-17 14:52:54,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 14:52:54,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:52:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 14:52:54,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-17 14:52:54,444 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 8 states. [2020-07-17 14:52:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:52:54,819 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-07-17 14:52:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 14:52:54,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-17 14:52:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:52:54,821 INFO L225 Difference]: With dead ends: 81 [2020-07-17 14:52:54,821 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 14:52:54,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-17 14:52:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 14:52:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-07-17 14:52:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 14:52:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-07-17 14:52:54,837 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-07-17 14:52:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:52:54,838 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-07-17 14:52:54,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 14:52:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-07-17 14:52:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 14:52:54,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:52:54,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:52:54,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:52:54,840 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:52:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:52:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-07-17 14:52:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:52:54,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983687146] [2020-07-17 14:52:54,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:52:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:52:55,132 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:52:55,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983687146] [2020-07-17 14:52:55,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:52:55,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 14:52:55,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301062851] [2020-07-17 14:52:55,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 14:52:55,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:52:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 14:52:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:52:55,135 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-07-17 14:52:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:52:55,561 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-07-17 14:52:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 14:52:55,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-07-17 14:52:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:52:55,566 INFO L225 Difference]: With dead ends: 87 [2020-07-17 14:52:55,566 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 14:52:55,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-07-17 14:52:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 14:52:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-07-17 14:52:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 14:52:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-17 14:52:55,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-07-17 14:52:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:52:55,593 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-17 14:52:55,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 14:52:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-17 14:52:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 14:52:55,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:52:55,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2020-07-17 14:52:55,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:52:55,598 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:52:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:52:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-07-17 14:52:55,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:52:55,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407260517] [2020-07-17 14:52:55,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:52:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:52:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:52:55,714 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:52:55,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407260517] [2020-07-17 14:52:55,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:52:55,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:52:55,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766546319] [2020-07-17 14:52:55,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:52:55,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:52:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:52:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:52:55,716 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-07-17 14:52:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:52:55,882 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-07-17 14:52:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 14:52:55,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-07-17 14:52:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:52:55,886 INFO L225 Difference]: With dead ends: 86 [2020-07-17 14:52:55,886 INFO L226 Difference]: Without dead ends: 71 [2020-07-17 14:52:55,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:52:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-17 14:52:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-07-17 14:52:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 14:52:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-07-17 14:52:55,901 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-07-17 14:52:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:52:55,902 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-07-17 14:52:55,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:52:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-07-17 14:52:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 14:52:55,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:52:55,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:52:55,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 14:52:55,904 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:52:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:52:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -632447720, now seen corresponding path program 1 times [2020-07-17 14:52:55,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:52:55,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380251574] [2020-07-17 14:52:55,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:52:55,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 14:52:55,912 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:290) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-17 14:52:55,918 INFO L168 Benchmark]: Toolchain (without parser) took 3273.18 ms. Allocated memory was 142.6 MB in the beginning and 255.3 MB in the end (delta: 112.7 MB). Free memory was 100.0 MB in the beginning and 223.2 MB in the end (delta: -123.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 14:52:55,919 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 14:52:55,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.23 ms. Allocated memory is still 142.6 MB. Free memory was 99.6 MB in the beginning and 89.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-17 14:52:55,921 INFO L168 Benchmark]: Boogie Preprocessor took 158.74 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 177.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-17 14:52:55,922 INFO L168 Benchmark]: RCFGBuilder took 440.76 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 158.9 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-07-17 14:52:55,923 INFO L168 Benchmark]: TraceAbstraction took 2407.17 ms. Allocated memory was 199.8 MB in the beginning and 255.3 MB in the end (delta: 55.6 MB). Free memory was 158.2 MB in the beginning and 223.2 MB in the end (delta: -64.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 14:52:55,927 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.23 ms. Allocated memory is still 142.6 MB. Free memory was 99.6 MB in the beginning and 89.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.74 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 177.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.76 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 158.9 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2407.17 ms. Allocated memory was 199.8 MB in the beginning and 255.3 MB in the end (delta: 55.6 MB). Free memory was 158.2 MB in the beginning and 223.2 MB in the end (delta: -64.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...