/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 0.1.25-72570d3 [2020-08-22 19:44:18,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:18,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:18,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:44:18,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:44:18,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:44:18,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:44:18,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:44:18,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:44:18,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:44:18,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:44:18,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:44:18,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:44:18,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:44:18,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:44:18,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:44:18,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:44:18,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:44:18,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:44:18,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:44:18,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:44:18,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:44:18,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:44:18,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:44:18,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:44:18,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:18,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:18,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:18,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:44:18,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:18,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:18,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:18,929 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:18,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:18,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:18,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:18,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:18,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:18,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:18,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:18,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:18,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:18,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:18,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:18,933 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:18,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:18,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:18,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:18,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:18,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:18,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:18,935 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:19,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:19,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:19,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:19,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:19,229 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:19,230 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 19:44:19,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb6586b4/984e7d9275ef4ae2a862194253e2183d/FLAGbe5624900 [2020-08-22 19:44:19,761 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:44:19,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 19:44:19,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb6586b4/984e7d9275ef4ae2a862194253e2183d/FLAGbe5624900 [2020-08-22 19:44:20,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb6586b4/984e7d9275ef4ae2a862194253e2183d [2020-08-22 19:44:20,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:44:20,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:44:20,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:20,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:44:20,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:44:20,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b23df30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20, skipping insertion in model container [2020-08-22 19:44:20,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:44:20,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:44:20,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:20,461 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:44:20,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:20,510 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:44:20,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20 WrapperNode [2020-08-22 19:44:20,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:20,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:44:20,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:44:20,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:44:20,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... [2020-08-22 19:44:20,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:44:20,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:44:20,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:44:20,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:44:20,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:20,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:44:20,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:44:20,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:44:20,749 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 19:44:20,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:44:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:44:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:44:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:44:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-22 19:44:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 19:44:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:44:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:44:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:44:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:44:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:44:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:44:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:44:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:44:21,078 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:44:21,078 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:44:21,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:21 BoogieIcfgContainer [2020-08-22 19:44:21,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:44:21,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:44:21,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:44:21,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:44:21,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:44:20" (1/3) ... [2020-08-22 19:44:21,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbdd052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:21, skipping insertion in model container [2020-08-22 19:44:21,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:20" (2/3) ... [2020-08-22 19:44:21,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbdd052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:21, skipping insertion in model container [2020-08-22 19:44:21,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:21" (3/3) ... [2020-08-22 19:44:21,092 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-22 19:44:21,100 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:44:21,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:44:21,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:44:21,144 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:44:21,144 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:44:21,144 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:44:21,144 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:44:21,144 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:44:21,145 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:44:21,145 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:44:21,145 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:44:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-08-22 19:44:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 19:44:21,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:21,173 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] [2020-08-22 19:44:21,174 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-08-22 19:44:21,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:21,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436108172] [2020-08-22 19:44:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:21,242 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:44:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:21,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436108172] [2020-08-22 19:44:21,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:21,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:44:21,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372722357] [2020-08-22 19:44:21,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:44:21,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:44:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:44:21,446 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-08-22 19:44:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:21,669 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-08-22 19:44:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:44:21,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-22 19:44:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:21,684 INFO L225 Difference]: With dead ends: 94 [2020-08-22 19:44:21,685 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 19:44:21,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:44:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 19:44:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-08-22 19:44:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 19:44:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-08-22 19:44:21,743 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-08-22 19:44:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:21,743 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-08-22 19:44:21,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:44:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-08-22 19:44:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 19:44:21,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:21,746 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] [2020-08-22 19:44:21,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:44:21,747 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-08-22 19:44:21,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:21,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010620050] [2020-08-22 19:44:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:21,751 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:44:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:21,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010620050] [2020-08-22 19:44:21,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:21,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:44:21,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144526659] [2020-08-22 19:44:21,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:44:21,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:44:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:44:21,965 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-08-22 19:44:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:22,271 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-22 19:44:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:44:22,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-22 19:44:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:22,274 INFO L225 Difference]: With dead ends: 81 [2020-08-22 19:44:22,274 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 19:44:22,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:44:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 19:44:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-22 19:44:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 19:44:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-22 19:44:22,290 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-08-22 19:44:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:22,291 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-22 19:44:22,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:44:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-22 19:44:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:44:22,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:22,293 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] [2020-08-22 19:44:22,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:44:22,293 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-08-22 19:44:22,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:22,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324951896] [2020-08-22 19:44:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:22,319 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:22,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:22,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:44:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:22,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324951896] [2020-08-22 19:44:22,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:22,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:44:22,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382516939] [2020-08-22 19:44:22,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:44:22,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:22,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:44:22,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:44:22,562 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-08-22 19:44:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:22,922 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-08-22 19:44:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:44:22,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 19:44:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:22,925 INFO L225 Difference]: With dead ends: 87 [2020-08-22 19:44:22,925 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 19:44:22,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:44:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 19:44:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-08-22 19:44:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 19:44:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-08-22 19:44:22,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-08-22 19:44:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:22,957 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-08-22 19:44:22,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:44:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-08-22 19:44:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:44:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:22,960 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] [2020-08-22 19:44:22,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:44:22,960 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-08-22 19:44:22,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:22,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434444748] [2020-08-22 19:44:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:22,976 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:23,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:44:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:23,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434444748] [2020-08-22 19:44:23,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:23,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:44:23,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316320732] [2020-08-22 19:44:23,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:44:23,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:44:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:44:23,126 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-08-22 19:44:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:23,270 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-08-22 19:44:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:44:23,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-08-22 19:44:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:23,273 INFO L225 Difference]: With dead ends: 86 [2020-08-22 19:44:23,274 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 19:44:23,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 19:44:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-08-22 19:44:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 19:44:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-08-22 19:44:23,289 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-08-22 19:44:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:23,289 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-08-22 19:44:23,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:44:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-08-22 19:44:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 19:44:23,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:23,291 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] [2020-08-22 19:44:23,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:44:23,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash -632447720, now seen corresponding path program 1 times [2020-08-22 19:44:23,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:23,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435948076] [2020-08-22 19:44:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:23,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:44:23,299 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:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:44:23,305 INFO L168 Benchmark]: Toolchain (without parser) took 3149.28 ms. Allocated memory was 139.5 MB in the beginning and 244.8 MB in the end (delta: 105.4 MB). Free memory was 102.0 MB in the beginning and 208.3 MB in the end (delta: -106.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:44:23,306 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:44:23,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.67 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:23,308 INFO L168 Benchmark]: Boogie Preprocessor took 160.45 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 181.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:23,309 INFO L168 Benchmark]: RCFGBuilder took 411.58 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 163.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:23,309 INFO L168 Benchmark]: TraceAbstraction took 2217.09 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.6 MB in the beginning and 208.3 MB in the end (delta: -45.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:44:23,314 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 352.67 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.45 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 181.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.58 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 163.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2217.09 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.6 MB in the beginning and 208.3 MB in the end (delta: -45.8 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:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...