/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/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:43,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:43,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:43,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:43,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:43,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:43,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:43,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:43,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:43,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:43,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:43,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:43,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:43,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:43,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:43,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:43,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:43,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:43,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:43,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:43,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:43,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:43,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:43,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:43,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:43,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:43,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:43,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:43,251 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 13:03:43,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:43,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:43,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:43,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:43,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:43,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:43,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:43,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:43,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:43,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:43,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:43,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:43,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:43,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:43,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:43,271 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:43,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:43,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:43,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:43,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:43,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:43,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:43,273 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:43,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:43,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:43,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:43,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:43,620 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:43,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-07 13:03:43,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18aed47b3/641bb0cad5724e87b96e749e161603eb/FLAG64a5545f9 [2020-07-07 13:03:44,171 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:44,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-07 13:03:44,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18aed47b3/641bb0cad5724e87b96e749e161603eb/FLAG64a5545f9 [2020-07-07 13:03:44,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18aed47b3/641bb0cad5724e87b96e749e161603eb [2020-07-07 13:03:44,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:44,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:44,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:44,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:44,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:44,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a645166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44, skipping insertion in model container [2020-07-07 13:03:44,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:44,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:44,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:44,726 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:44,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:44,756 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:44,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44 WrapperNode [2020-07-07 13:03:44,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:44,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:44,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:44,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:44,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (1/1) ... [2020-07-07 13:03:44,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:44,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:44,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:44,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:44,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (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 13:03:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-07 13:03:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:45,113 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:45,114 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:45,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:45 BoogieIcfgContainer [2020-07-07 13:03:45,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:45,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:45,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:45,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:45,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:44" (1/3) ... [2020-07-07 13:03:45,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc80b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:45, skipping insertion in model container [2020-07-07 13:03:45,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:44" (2/3) ... [2020-07-07 13:03:45,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc80b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:45, skipping insertion in model container [2020-07-07 13:03:45,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:45" (3/3) ... [2020-07-07 13:03:45,126 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-07-07 13:03:45,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:45,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:45,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:45,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:45,205 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:45,206 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:45,206 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:45,206 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:45,206 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:45,206 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:45,207 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-07 13:03:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 13:03:45,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:45,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:45,241 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 607163649, now seen corresponding path program 1 times [2020-07-07 13:03:45,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:45,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592165884] [2020-07-07 13:03:45,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:45,554 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 13:03:45,555 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:45,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592165884] [2020-07-07 13:03:45,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:45,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:45,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721813773] [2020-07-07 13:03:45,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:45,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:45,580 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 7 states. [2020-07-07 13:03:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:45,775 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-07 13:03:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:03:45,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 13:03:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:45,789 INFO L225 Difference]: With dead ends: 44 [2020-07-07 13:03:45,790 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 13:03:45,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 13:03:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-07 13:03:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 13:03:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-07 13:03:45,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-07-07 13:03:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:45,845 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-07 13:03:45,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-07 13:03:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:03:45,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:45,848 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-07 13:03:45,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:45,849 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1887435767, now seen corresponding path program 1 times [2020-07-07 13:03:45,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:45,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786822099] [2020-07-07 13:03:45,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:45,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:45,898 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:03:45,904 INFO L168 Benchmark]: Toolchain (without parser) took 1374.91 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 127.1 MB in the end (delta: -25.3 MB). Peak memory consumption was 37.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,907 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.02 ms. Allocated memory is still 136.3 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,912 INFO L168 Benchmark]: Boogie Preprocessor took 27.82 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,913 INFO L168 Benchmark]: RCFGBuilder took 332.10 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 90.4 MB in the beginning and 165.8 MB in the end (delta: -75.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,915 INFO L168 Benchmark]: TraceAbstraction took 781.32 ms. Allocated memory is still 198.7 MB. Free memory was 165.8 MB in the beginning and 127.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:45,927 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.02 ms. Allocated memory is still 136.3 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.82 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.10 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 90.4 MB in the beginning and 165.8 MB in the end (delta: -75.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 781.32 ms. Allocated memory is still 198.7 MB. Free memory was 165.8 MB in the beginning and 127.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 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...