/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-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:44:16,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:16,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:16,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:44:16,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:44:16,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:44:16,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:44:16,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:44:16,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:44:16,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:44:16,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:44:16,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:44:16,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:44:16,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:44:16,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:44:16,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:44:16,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:44:16,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:44:16,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:44:16,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:44:16,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:44:16,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:44:16,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:44:16,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:44:16,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:44:16,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:16,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:16,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:16,994 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 19:44:17,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:17,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:17,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:17,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:17,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:17,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:17,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:17,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:17,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:17,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:17,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:17,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:17,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:17,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:17,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:17,017 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:17,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:17,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:17,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:17,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:17,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:17,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:17,019 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:17,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:17,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:17,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:17,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:17,293 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:17,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-08-22 19:44:17,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caf6dfa/6112165d62264faa82e940afa392151a/FLAGbd51a3183 [2020-08-22 19:44:17,751 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:44:17,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-08-22 19:44:17,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caf6dfa/6112165d62264faa82e940afa392151a/FLAGbd51a3183 [2020-08-22 19:44:18,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4caf6dfa/6112165d62264faa82e940afa392151a [2020-08-22 19:44:18,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:44:18,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:44:18,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:18,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:44:18,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:44:18,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bb1976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18, skipping insertion in model container [2020-08-22 19:44:18,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:44:18,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:44:18,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:18,401 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:44:18,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:18,438 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:44:18,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18 WrapperNode [2020-08-22 19:44:18,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:18,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:44:18,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:44:18,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:44:18,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (1/1) ... [2020-08-22 19:44:18,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:44:18,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:44:18,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:44:18,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:44:18,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (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 19:44:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:44:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:44:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:44:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:44:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:44:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:44:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:44:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:44:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:44:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:44:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:44:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:44:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:44:18,961 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:44:18,961 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:44:18,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:18 BoogieIcfgContainer [2020-08-22 19:44:18,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:44:18,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:44:18,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:44:18,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:44:18,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:44:18" (1/3) ... [2020-08-22 19:44:18,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d31611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:18, skipping insertion in model container [2020-08-22 19:44:18,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:18" (2/3) ... [2020-08-22 19:44:18,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d31611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:18, skipping insertion in model container [2020-08-22 19:44:18,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:18" (3/3) ... [2020-08-22 19:44:18,974 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-08-22 19:44:18,984 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:44:18,991 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:44:19,004 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:44:19,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:44:19,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:44:19,026 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:44:19,026 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:44:19,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:44:19,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:44:19,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:44:19,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:44:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-08-22 19:44:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:44:19,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:19,052 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] [2020-08-22 19:44:19,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1270765896, now seen corresponding path program 1 times [2020-08-22 19:44:19,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:19,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162560651] [2020-08-22 19:44:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:19,113 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:44:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,312 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 19:44:19,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162560651] [2020-08-22 19:44:19,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:19,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:44:19,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847940426] [2020-08-22 19:44:19,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:44:19,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:44:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:19,340 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-08-22 19:44:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:19,530 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-08-22 19:44:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:44:19,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 19:44:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:19,542 INFO L225 Difference]: With dead ends: 108 [2020-08-22 19:44:19,542 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:44:19,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:44:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-22 19:44:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:44:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-08-22 19:44:19,597 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 33 [2020-08-22 19:44:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:19,598 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-08-22 19:44:19,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:44:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-08-22 19:44:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:44:19,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:19,600 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] [2020-08-22 19:44:19,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:44:19,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 50142755, now seen corresponding path program 1 times [2020-08-22 19:44:19,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:19,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146516601] [2020-08-22 19:44:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:19,606 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:44:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,726 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 19:44:19,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146516601] [2020-08-22 19:44:19,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:19,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:44:19,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143583291] [2020-08-22 19:44:19,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:44:19,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:44:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:44:19,730 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 5 states. [2020-08-22 19:44:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:19,955 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2020-08-22 19:44:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:44:19,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 19:44:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:19,959 INFO L225 Difference]: With dead ends: 106 [2020-08-22 19:44:19,959 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 19:44:19,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 19:44:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2020-08-22 19:44:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 19:44:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-08-22 19:44:19,979 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 33 [2020-08-22 19:44:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:19,979 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-08-22 19:44:19,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:44:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-08-22 19:44:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 19:44:19,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:19,981 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, 1, 1, 1, 1, 1] [2020-08-22 19:44:19,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:44:19,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1001580845, now seen corresponding path program 1 times [2020-08-22 19:44:19,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:19,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283749497] [2020-08-22 19:44:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:20,007 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 19:44:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,165 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 19:44:20,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283749497] [2020-08-22 19:44:20,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:20,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:44:20,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712718751] [2020-08-22 19:44:20,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:44:20,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:44:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:44:20,171 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 7 states. [2020-08-22 19:44:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:20,468 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-08-22 19:44:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:44:20,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-22 19:44:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:20,471 INFO L225 Difference]: With dead ends: 110 [2020-08-22 19:44:20,471 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 19:44:20,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:44:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 19:44:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-08-22 19:44:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 19:44:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-08-22 19:44:20,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 40 [2020-08-22 19:44:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:20,487 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-08-22 19:44:20,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:44:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-08-22 19:44:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 19:44:20,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:20,489 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-08-22 19:44:20,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:44:20,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1248131107, now seen corresponding path program 2 times [2020-08-22 19:44:20,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:20,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511565903] [2020-08-22 19:44:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:20,496 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 19:44:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,752 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 19:44:20,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511565903] [2020-08-22 19:44:20,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:20,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:44:20,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621593652] [2020-08-22 19:44:20,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:44:20,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:44:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:20,755 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 6 states. [2020-08-22 19:44:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:20,927 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-08-22 19:44:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:44:20,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-08-22 19:44:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:20,929 INFO L225 Difference]: With dead ends: 94 [2020-08-22 19:44:20,930 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 19:44:20,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:44:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 19:44:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-22 19:44:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 19:44:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-08-22 19:44:20,946 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-08-22 19:44:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:20,947 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-08-22 19:44:20,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:44:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-08-22 19:44:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 19:44:20,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:20,949 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:20,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:44:20,949 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash -153041457, now seen corresponding path program 1 times [2020-08-22 19:44:20,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:20,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165620566] [2020-08-22 19:44:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:20,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:44:20,964 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 19:44:20,970 INFO L168 Benchmark]: Toolchain (without parser) took 2784.58 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 104.1 MB in the beginning and 96.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 103.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,971 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.85 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,973 INFO L168 Benchmark]: Boogie Preprocessor took 114.60 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,974 INFO L168 Benchmark]: RCFGBuilder took 411.24 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,975 INFO L168 Benchmark]: TraceAbstraction took 1999.78 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 160.4 MB in the beginning and 96.1 MB in the end (delta: 64.3 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:20,979 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.85 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.60 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.24 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1999.78 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 160.4 MB in the beginning and 96.1 MB in the end (delta: 64.3 MB). Peak memory consumption was 96.8 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:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...