/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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:34,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:34,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:34,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:34,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:34,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:34,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:34,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:34,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:34,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:34,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:34,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:34,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:34,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:34,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:34,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:34,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:34,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:34,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:34,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:34,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:34,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:34,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:34,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:34,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:34,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:34,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:34,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:34,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:03:34,440 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:34,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:34,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:34,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:34,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:34,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:34,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:34,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:34,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:34,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:34,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:34,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:34,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:34,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:34,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:34,444 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:34,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:34,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:34,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:34,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:34,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:34,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:34,446 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:34,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:34,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:34,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:34,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:34,760 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:34,761 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-07 13:03:34,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cdffdaf2/aebd530bb5ef43d6921dfb0f997cb6fe/FLAG3ae61510b [2020-07-07 13:03:35,230 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:35,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-07 13:03:35,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cdffdaf2/aebd530bb5ef43d6921dfb0f997cb6fe/FLAG3ae61510b [2020-07-07 13:03:35,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cdffdaf2/aebd530bb5ef43d6921dfb0f997cb6fe [2020-07-07 13:03:35,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:35,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:35,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:35,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:35,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:35,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41eb98f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35, skipping insertion in model container [2020-07-07 13:03:35,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:35,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:35,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:35,887 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:35,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:35,918 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:35,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35 WrapperNode [2020-07-07 13:03:35,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:35,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:35,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:35,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:35,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... [2020-07-07 13:03:35,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:35,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:35,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:35,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:35,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:36,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:36,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:36,095 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-07 13:03:36,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:36,318 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:36,318 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:36,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:36 BoogieIcfgContainer [2020-07-07 13:03:36,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:36,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:36,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:36,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:36,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:35" (1/3) ... [2020-07-07 13:03:36,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c6a792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:36, skipping insertion in model container [2020-07-07 13:03:36,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:35" (2/3) ... [2020-07-07 13:03:36,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c6a792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:36, skipping insertion in model container [2020-07-07 13:03:36,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:36" (3/3) ... [2020-07-07 13:03:36,331 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-07 13:03:36,341 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:36,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:36,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:36,380 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:36,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:36,381 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:36,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:36,381 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:36,381 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:36,381 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:36,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-07 13:03:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 13:03:36,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:36,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:36,408 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-07-07 13:03:36,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:36,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173092878] [2020-07-07 13:03:36,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:36,742 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:36,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173092878] [2020-07-07 13:03:36,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:36,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:36,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595448056] [2020-07-07 13:03:36,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:36,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:36,767 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-07-07 13:03:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:36,939 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-07-07 13:03:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:03:36,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-07 13:03:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:36,952 INFO L225 Difference]: With dead ends: 60 [2020-07-07 13:03:36,952 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 13:03:36,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:03:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 13:03:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-07 13:03:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 13:03:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-07 13:03:37,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-07-07 13:03:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:37,006 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-07 13:03:37,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-07 13:03:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 13:03:37,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:37,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:37,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:37,010 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:37,011 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-07-07 13:03:37,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:37,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622922203] [2020-07-07 13:03:37,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:37,134 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:37,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622922203] [2020-07-07 13:03:37,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:37,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:03:37,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705628528] [2020-07-07 13:03:37,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:03:37,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:37,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:03:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:03:37,138 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-07-07 13:03:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:37,216 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-07-07 13:03:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:03:37,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-07 13:03:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:37,219 INFO L225 Difference]: With dead ends: 46 [2020-07-07 13:03:37,219 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 13:03:37,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:03:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 13:03:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-07 13:03:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 13:03:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-07 13:03:37,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-07-07 13:03:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:37,234 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-07 13:03:37,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:03:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-07 13:03:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 13:03:37,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:37,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:37,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:37,237 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-07-07 13:03:37,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:37,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33373101] [2020-07-07 13:03:37,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:37,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:03:37,257 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:03:37,263 INFO L168 Benchmark]: Toolchain (without parser) took 1600.89 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 104.4 MB in the beginning and 110.0 MB in the end (delta: -5.6 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,264 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.64 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,266 INFO L168 Benchmark]: Boogie Preprocessor took 25.30 ms. Allocated memory is still 146.3 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,267 INFO L168 Benchmark]: RCFGBuilder took 377.55 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 167.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,268 INFO L168 Benchmark]: TraceAbstraction took 936.39 ms. Allocated memory is still 202.9 MB. Free memory was 167.2 MB in the beginning and 110.0 MB in the end (delta: 57.2 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:37,272 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.64 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.30 ms. Allocated memory is still 146.3 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 377.55 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 167.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 936.39 ms. Allocated memory is still 202.9 MB. Free memory was 167.2 MB in the beginning and 110.0 MB in the end (delta: 57.2 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...