/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:21:09,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:21:09,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:21:09,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:21:09,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:21:09,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:21:09,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:21:09,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:21:09,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:21:09,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:21:09,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:21:09,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:21:09,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:21:09,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:21:09,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:21:09,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:21:09,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:21:09,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:21:09,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:21:09,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:21:09,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:21:09,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:21:09,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:21:09,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:21:09,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:21:09,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:21:09,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:21:09,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:21:09,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:21:09,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:21:09,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:21:09,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:21:09,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:21:09,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:21:09,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:21:09,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:21:09,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:21:09,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:21:09,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:21:09,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:21:09,990 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:21:09,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:21:09,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:21:09,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:21:09,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:21:09,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:21:09,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:21:09,992 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:21:09,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:21:09,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:21:09,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:21:09,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:21:09,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:21:09,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:21:09,993 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:21:10,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:21:10,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:21:10,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:21:10,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:21:10,354 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:21:10,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-17 17:21:10,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abc10b9c/92bdc3ec01cd48aea09c96eb898166ef/FLAG9e2cb7eda [2020-07-17 17:21:10,996 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:21:10,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-17 17:21:11,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abc10b9c/92bdc3ec01cd48aea09c96eb898166ef/FLAG9e2cb7eda [2020-07-17 17:21:11,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abc10b9c/92bdc3ec01cd48aea09c96eb898166ef [2020-07-17 17:21:11,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:21:11,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:21:11,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:11,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:21:11,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:21:11,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5155a845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11, skipping insertion in model container [2020-07-17 17:21:11,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:21:11,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:21:11,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:11,581 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:21:11,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:11,614 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:21:11,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11 WrapperNode [2020-07-17 17:21:11,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:11,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:21:11,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:21:11,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:21:11,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (1/1) ... [2020-07-17 17:21:11,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:21:11,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:21:11,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:21:11,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:21:11,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (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 [2020-07-17 17:21:11,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:21:11,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:21:11,829 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 17:21:11,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:21:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:21:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:21:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 17:21:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:21:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:21:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:21:12,029 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:21:12,030 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:21:12,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:12 BoogieIcfgContainer [2020-07-17 17:21:12,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:21:12,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:21:12,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:21:12,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:21:12,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:21:11" (1/3) ... [2020-07-17 17:21:12,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed7f462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:12, skipping insertion in model container [2020-07-17 17:21:12,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:11" (2/3) ... [2020-07-17 17:21:12,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed7f462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:12, skipping insertion in model container [2020-07-17 17:21:12,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:12" (3/3) ... [2020-07-17 17:21:12,040 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-07-17 17:21:12,049 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:21:12,055 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:21:12,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:21:12,093 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:21:12,093 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:21:12,094 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:21:12,094 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:21:12,094 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:21:12,094 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:21:12,094 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:21:12,094 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:21:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-17 17:21:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:21:12,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:12,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:12,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-07-17 17:21:12,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:12,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904569169] [2020-07-17 17:21:12,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:21:12,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904569169] [2020-07-17 17:21:12,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:12,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:12,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467012628] [2020-07-17 17:21:12,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:12,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:12,496 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-07-17 17:21:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:12,594 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-17 17:21:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:12,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 17:21:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:12,606 INFO L225 Difference]: With dead ends: 44 [2020-07-17 17:21:12,606 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 17:21:12,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:21:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 17:21:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 17:21:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 17:21:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-17 17:21:12,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-07-17 17:21:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:12,657 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-17 17:21:12,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-17 17:21:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 17:21:12,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:12,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:12,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:21:12,662 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-07-17 17:21:12,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:12,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862397854] [2020-07-17 17:21:12,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:21:12,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862397854] [2020-07-17 17:21:12,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:12,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:12,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237744475] [2020-07-17 17:21:12,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:12,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:12,815 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-07-17 17:21:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:12,874 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-07-17 17:21:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:12,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-17 17:21:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:12,877 INFO L225 Difference]: With dead ends: 49 [2020-07-17 17:21:12,877 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:21:12,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:21:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:21:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-17 17:21:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 17:21:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-17 17:21:12,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-07-17 17:21:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:12,890 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-17 17:21:12,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-17 17:21:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 17:21:12,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:12,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:12,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:21:12,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-07-17 17:21:12,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:12,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271270745] [2020-07-17 17:21:12,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:21:13,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271270745] [2020-07-17 17:21:13,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:13,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:21:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432931881] [2020-07-17 17:21:13,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:21:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:21:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:21:13,076 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-07-17 17:21:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:13,175 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-07-17 17:21:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:21:13,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-17 17:21:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:13,178 INFO L225 Difference]: With dead ends: 41 [2020-07-17 17:21:13,178 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:21:13,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:21:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:21:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 17:21:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:21:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-07-17 17:21:13,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-07-17 17:21:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:13,191 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-07-17 17:21:13,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:21:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-07-17 17:21:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 17:21:13,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:13,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-17 17:21:13,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:21:13,194 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-07-17 17:21:13,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:13,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242643560] [2020-07-17 17:21:13,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 17:21:13,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242643560] [2020-07-17 17:21:13,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:13,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:13,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849850787] [2020-07-17 17:21:13,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:13,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:13,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:13,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:13,370 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-07-17 17:21:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:13,412 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-17 17:21:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:13,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-17 17:21:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:13,414 INFO L225 Difference]: With dead ends: 43 [2020-07-17 17:21:13,415 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 17:21:13,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:21:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 17:21:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-17 17:21:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:21:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-07-17 17:21:13,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38 [2020-07-17 17:21:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:13,427 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-07-17 17:21:13,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-07-17 17:21:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 17:21:13,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:13,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:13,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:21:13,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-07-17 17:21:13,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:13,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765580215] [2020-07-17 17:21:13,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:21:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:21:13,551 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:21:13,551 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:21:13,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:21:13,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:21:13 BoogieIcfgContainer [2020-07-17 17:21:13,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:21:13,592 INFO L168 Benchmark]: Toolchain (without parser) took 2228.36 ms. Allocated memory was 139.5 MB in the beginning and 229.1 MB in the end (delta: 89.7 MB). Free memory was 101.2 MB in the beginning and 193.9 MB in the end (delta: -92.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 17:21:13,595 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 17:21:13,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.26 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:13,598 INFO L168 Benchmark]: Boogie Preprocessor took 30.73 ms. Allocated memory is still 139.5 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:13,604 INFO L168 Benchmark]: RCFGBuilder took 386.24 ms. Allocated memory was 139.5 MB in the beginning and 199.8 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 166.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:13,606 INFO L168 Benchmark]: TraceAbstraction took 1551.44 ms. Allocated memory was 199.8 MB in the beginning and 229.1 MB in the end (delta: 29.4 MB). Free memory was 166.6 MB in the beginning and 193.9 MB in the end (delta: -27.4 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:13,618 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.26 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.73 ms. Allocated memory is still 139.5 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 386.24 ms. Allocated memory was 139.5 MB in the beginning and 199.8 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 166.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1551.44 ms. Allocated memory was 199.8 MB in the beginning and 229.1 MB in the end (delta: 29.4 MB). Free memory was 166.6 MB in the beginning and 193.9 MB in the end (delta: -27.4 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=2, input=2] [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; VAL [\old(x)=1, id((unsigned int)x-1)=0, ret=1, x=1] [L7] COND FALSE !(ret > 3) VAL [\old(x)=1, ret=1, x=1] [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; VAL [\old(x)=2, id((unsigned int)x-1)=1, ret=2, x=2] [L7] COND FALSE !(ret > 3) VAL [\old(x)=2, ret=2, x=2] [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) VAL [id(input)=2, input=2] [L13] int result = id(input); VAL [id(input)=2, input=2, result=2] [L14] COND TRUE result == 2 VAL [input=2, result=2] [L15] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 12 SDslu, 342 SDs, 0 SdLazy, 90 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 4790 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 23/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...