/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-fpi/s1liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:58:13,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:58:13,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:58:13,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:58:13,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:58:13,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:58:13,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:58:13,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:58:13,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:58:13,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:58:13,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:58:13,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:58:13,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:58:13,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:58:13,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:58:13,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:58:13,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:58:13,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:58:13,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:58:13,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:58:13,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:58:13,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:58:13,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:58:13,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:58:13,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:58:13,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:58:13,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:58:13,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:58:13,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:58:13,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:58:13,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:58:13,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:58:13,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:58:13,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:58:13,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:58:13,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:58:13,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:58:13,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:58:13,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:58:13,193 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:58:13,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:58:13,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:58:13,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:58:13,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:58:13,195 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:58:13,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:58:13,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:58:13,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:13,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:58:13,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:58:13,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:58:13,196 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:58:13,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:58:13,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:58:13,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:58:13,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:58:13,525 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:58:13,525 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1liff.c [2020-07-07 13:58:13,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3de0ed6/996b51d80d87482085bda89d7e15978d/FLAG5958f027a [2020-07-07 13:58:14,051 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:58:14,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1liff.c [2020-07-07 13:58:14,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3de0ed6/996b51d80d87482085bda89d7e15978d/FLAG5958f027a [2020-07-07 13:58:14,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3de0ed6/996b51d80d87482085bda89d7e15978d [2020-07-07 13:58:14,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:58:14,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:58:14,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:14,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:58:14,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:58:14,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d6acd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14, skipping insertion in model container [2020-07-07 13:58:14,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:58:14,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:58:14,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:14,658 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:58:14,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:14,695 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:58:14,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14 WrapperNode [2020-07-07 13:58:14,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:14,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:58:14,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:58:14,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:58:14,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... [2020-07-07 13:58:14,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:58:14,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:58:14,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:58:14,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:58:14,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:58:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:58:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 13:58:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:58:14,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:58:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:58:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 13:58:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 13:58:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:58:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:58:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:58:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:58:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:58:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:58:15,272 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:58:15,273 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 13:58:15,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:15 BoogieIcfgContainer [2020-07-07 13:58:15,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:58:15,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:58:15,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:58:15,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:58:15,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:58:14" (1/3) ... [2020-07-07 13:58:15,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5651dae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:15, skipping insertion in model container [2020-07-07 13:58:15,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:14" (2/3) ... [2020-07-07 13:58:15,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5651dae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:15, skipping insertion in model container [2020-07-07 13:58:15,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:15" (3/3) ... [2020-07-07 13:58:15,292 INFO L109 eAbstractionObserver]: Analyzing ICFG s1liff.c [2020-07-07 13:58:15,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:58:15,306 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:58:15,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:58:15,340 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:58:15,340 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:58:15,340 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:58:15,340 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:58:15,341 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:58:15,341 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:58:15,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:58:15,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:58:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-07-07 13:58:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:58:15,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:15,367 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] [2020-07-07 13:58:15,368 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-07-07 13:58:15,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:15,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91265250] [2020-07-07 13:58:15,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:15,603 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:15,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91265250] [2020-07-07 13:58:15,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:15,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:58:15,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739679260] [2020-07-07 13:58:15,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:58:15,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:15,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:58:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:58:15,633 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-07-07 13:58:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:15,847 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-07-07 13:58:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:58:15,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-07 13:58:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:15,860 INFO L225 Difference]: With dead ends: 125 [2020-07-07 13:58:15,860 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 13:58:15,864 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 [2020-07-07 13:58:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 13:58:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-07 13:58:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-07 13:58:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-07 13:58:15,911 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-07-07 13:58:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:15,911 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-07 13:58:15,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:58:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-07 13:58:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:58:15,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:15,914 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] [2020-07-07 13:58:15,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:58:15,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-07-07 13:58:15,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:15,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262848470] [2020-07-07 13:58:15,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:16,051 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:16,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262848470] [2020-07-07 13:58:16,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:16,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:16,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105499412] [2020-07-07 13:58:16,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:16,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:16,057 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-07-07 13:58:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:16,332 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-07-07 13:58:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:58:16,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-07 13:58:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:16,346 INFO L225 Difference]: With dead ends: 115 [2020-07-07 13:58:16,346 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 13:58:16,350 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 [2020-07-07 13:58:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 13:58:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-07-07 13:58:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-07 13:58:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-07-07 13:58:16,381 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-07-07 13:58:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:16,381 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-07-07 13:58:16,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-07-07 13:58:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-07 13:58:16,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:16,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:58:16,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:58:16,390 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-07-07 13:58:16,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:16,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636716155] [2020-07-07 13:58:16,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:16,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:58:16,431 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:58:16,437 INFO L168 Benchmark]: Toolchain (without parser) took 2001.06 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 103.0 MB in the beginning and 199.7 MB in the end (delta: -96.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:58:16,438 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:58:16,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.75 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:16,440 INFO L168 Benchmark]: Boogie Preprocessor took 129.83 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 179.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:16,441 INFO L168 Benchmark]: RCFGBuilder took 453.24 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 158.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:16,442 INFO L168 Benchmark]: TraceAbstraction took 1153.40 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 158.4 MB in the beginning and 199.7 MB in the end (delta: -41.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:58:16,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.75 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.83 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 179.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.24 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 158.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1153.40 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 158.4 MB in the beginning and 199.7 MB in the end (delta: -41.4 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:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...