/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:28,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:28,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:28,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:28,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:28,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:28,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:28,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:28,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:28,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:28,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:28,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:28,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:28,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:28,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:28,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:28,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:28,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:28,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:28,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:28,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:28,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:28,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:28,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:28,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:28,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:28,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:28,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:28,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:03:28,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:28,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:28,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:28,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:28,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:28,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:28,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:28,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:28,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:28,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:28,063 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:28,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:28,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:28,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:28,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:28,064 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:28,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:28,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:28,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:28,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:28,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:28,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:28,066 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:28,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:28,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:28,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:28,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:28,375 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:28,375 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-07 13:03:28,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63695af0/b95380d6ee034957a8b579e5cf6bca54/FLAGd1756f0b6 [2020-07-07 13:03:28,863 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:28,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-07 13:03:28,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63695af0/b95380d6ee034957a8b579e5cf6bca54/FLAGd1756f0b6 [2020-07-07 13:03:29,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63695af0/b95380d6ee034957a8b579e5cf6bca54 [2020-07-07 13:03:29,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:29,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:29,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:29,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:29,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:29,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f736972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29, skipping insertion in model container [2020-07-07 13:03:29,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:29,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:29,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:29,462 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:29,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:29,487 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:29,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29 WrapperNode [2020-07-07 13:03:29,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:29,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:29,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:29,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:29,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... [2020-07-07 13:03:29,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:29,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:29,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:29,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:29,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:29,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-07 13:03:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:29,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:29,913 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:29,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:29 BoogieIcfgContainer [2020-07-07 13:03:29,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:29,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:29,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:29,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:29,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:29" (1/3) ... [2020-07-07 13:03:29,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f7ccaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:29, skipping insertion in model container [2020-07-07 13:03:29,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:29" (2/3) ... [2020-07-07 13:03:29,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f7ccaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:29, skipping insertion in model container [2020-07-07 13:03:29,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:29" (3/3) ... [2020-07-07 13:03:29,941 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-07 13:03:29,956 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:29,974 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:29,986 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:30,006 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:30,006 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:30,006 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:30,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:30,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:30,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:30,007 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:30,007 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-07 13:03:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 13:03:30,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:30,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:30,034 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash 346555185, now seen corresponding path program 1 times [2020-07-07 13:03:30,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:30,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914421138] [2020-07-07 13:03:30,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:30,391 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:30,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914421138] [2020-07-07 13:03:30,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:30,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:30,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999167054] [2020-07-07 13:03:30,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:30,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:30,420 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 7 states. [2020-07-07 13:03:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:30,634 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-07 13:03:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:03:30,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-07 13:03:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:30,648 INFO L225 Difference]: With dead ends: 46 [2020-07-07 13:03:30,648 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 13:03:30,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:03:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 13:03:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 13:03:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:03:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-07 13:03:30,702 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2020-07-07 13:03:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:30,703 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-07 13:03:30,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-07 13:03:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:03:30,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:30,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-07 13:03:30,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:30,707 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1167280018, now seen corresponding path program 1 times [2020-07-07 13:03:30,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:30,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022672656] [2020-07-07 13:03:30,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 Garbage collection #4: 113 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 113 to 223 [2020-07-07 13:03:30,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:30,770 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: must have same length at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.constructEpsilon(AcceleratedInterpolation.java:510) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:449) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:03:30,777 INFO L168 Benchmark]: Toolchain (without parser) took 1506.55 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 113.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,779 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.63 ms. Allocated memory is still 141.6 MB. Free memory was 99.7 MB in the beginning and 90.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,780 INFO L168 Benchmark]: Boogie Preprocessor took 22.52 ms. Allocated memory is still 141.6 MB. Free memory was 90.0 MB in the beginning and 88.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,781 INFO L168 Benchmark]: RCFGBuilder took 410.18 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 88.7 MB in the beginning and 166.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,782 INFO L168 Benchmark]: TraceAbstraction took 849.03 ms. Allocated memory is still 199.8 MB. Free memory was 166.1 MB in the beginning and 113.6 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:30,787 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 216.63 ms. Allocated memory is still 141.6 MB. Free memory was 99.7 MB in the beginning and 90.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.52 ms. Allocated memory is still 141.6 MB. Free memory was 90.0 MB in the beginning and 88.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.18 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 88.7 MB in the beginning and 166.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 849.03 ms. Allocated memory is still 199.8 MB. Free memory was 166.1 MB in the beginning and 113.6 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: must have same length de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: must have same length: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...