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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:56:04,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:56:04,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:56:04,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:56:04,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:56:04,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:56:04,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:56:04,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:56:04,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:56:04,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:56:04,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:56:04,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:56:04,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:56:04,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:56:04,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:56:04,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:56:04,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:56:04,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:56:04,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:56:04,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:56:04,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:56:04,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:56:04,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:56:04,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:56:04,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 20:56:04,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 20:56:04,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 20:56:04,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 20:56:04,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 20:56:04,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 20:56:04,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:56:04,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:56:04,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:56:04,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:56:04,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:56:04,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:56:04,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:56:04,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:56:04,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:56:04,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:56:04,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:56:04,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 20:56:04,922 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:56:04,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:56:04,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:56:04,923 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:56:04,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:56:04,924 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:56:04,924 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:56:04,924 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:56:04,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:56:04,925 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:56:04,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:56:04,926 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:56:04,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:56:04,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:56:04,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:56:04,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:56:04,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:56:04,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:56:04,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:56:04,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:56:04,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:56:04,928 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:56:04,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:56:04,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:56:04,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:56:04,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:56:04,929 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:56:04,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:56:04,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:56:04,929 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:56:04,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:56:04,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:56:04,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:56:04,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:56:04,975 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:56:04,976 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2019-09-03 20:56:05,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4f0ecda/d2dd706d9eeb4f3fbee1e11987f1320c/FLAG85d5f5651 [2019-09-03 20:56:05,456 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:56:05,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2019-09-03 20:56:05,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4f0ecda/d2dd706d9eeb4f3fbee1e11987f1320c/FLAG85d5f5651 [2019-09-03 20:56:05,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4f0ecda/d2dd706d9eeb4f3fbee1e11987f1320c [2019-09-03 20:56:05,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:56:05,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:56:05,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:56:05,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:56:05,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:56:05,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:56:05" (1/1) ... [2019-09-03 20:56:05,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455f23cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:05, skipping insertion in model container [2019-09-03 20:56:05,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:56:05" (1/1) ... [2019-09-03 20:56:05,894 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:56:05,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:56:06,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:56:06,109 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:56:06,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:56:06,141 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:56:06,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06 WrapperNode [2019-09-03 20:56:06,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:56:06,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:56:06,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:56:06,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:56:06,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (1/1) ... [2019-09-03 20:56:06,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:56:06,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:56:06,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:56:06,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:56:06,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (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 [2019-09-03 20:56:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:56:06,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:56:06,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:56:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:56:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:56:06,470 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:56:06,470 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-03 20:56:06,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:56:06 BoogieIcfgContainer [2019-09-03 20:56:06,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:56:06,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:56:06,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:56:06,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:56:06,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:56:05" (1/3) ... [2019-09-03 20:56:06,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a53db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:56:06, skipping insertion in model container [2019-09-03 20:56:06,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:06" (2/3) ... [2019-09-03 20:56:06,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a53db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:56:06, skipping insertion in model container [2019-09-03 20:56:06,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:56:06" (3/3) ... [2019-09-03 20:56:06,478 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2019-09-03 20:56:06,486 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:56:06,493 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:56:06,508 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:56:06,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:56:06,534 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:56:06,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:56:06,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:56:06,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:56:06,535 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:56:06,535 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:56:06,535 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:56:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-03 20:56:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:56:06,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:06,558 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:06,559 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-03 20:56:06,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:06,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:06,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:06,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:06,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:56:06,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:56:06,707 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:56:06,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:56:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:56:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:56:06,723 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-09-03 20:56:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:06,755 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-09-03 20:56:06,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:56:06,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-03 20:56:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:06,764 INFO L225 Difference]: With dead ends: 19 [2019-09-03 20:56:06,764 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:56:06,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:56:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:56:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:56:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:56:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 20:56:06,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 20:56:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:06,796 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 20:56:06,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:56:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 20:56:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:56:06,797 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:06,797 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:06,797 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-03 20:56:06,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:06,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:06,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:06,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:06,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:06,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:06,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:06,871 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2019-09-03 20:56:06,877 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [19], [22], [23], [27], [28], [29] [2019-09-03 20:56:06,923 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:56:06,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:56:07,061 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:56:07,064 INFO L272 AbstractInterpreter]: Visited 12 different actions 34 times. Merged at 4 different actions 21 times. Widened at 1 different actions 3 times. Performed 102 root evaluator evaluations with a maximum evaluation depth of 4. Performed 102 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-09-03 20:56:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:07,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:56:07,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:07,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:56:07,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:07,079 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:56:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:07,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:56:07,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:07,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:07,173 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:07,217 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:56:07,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-09-03 20:56:07,218 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:56:07,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:56:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:56:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:56:07,220 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2019-09-03 20:56:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:07,246 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-09-03 20:56:07,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:56:07,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-09-03 20:56:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:07,247 INFO L225 Difference]: With dead ends: 11 [2019-09-03 20:56:07,248 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:56:07,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:56:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:56:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:56:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:56:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:56:07,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-09-03 20:56:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:07,250 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:56:07,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:56:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:56:07,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:56:07,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:56:07 BoogieIcfgContainer [2019-09-03 20:56:07,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:56:07,258 INFO L168 Benchmark]: Toolchain (without parser) took 1381.09 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 88.9 MB in the beginning and 119.6 MB in the end (delta: -30.7 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,259 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.32 ms. Allocated memory is still 141.0 MB. Free memory was 88.6 MB in the beginning and 79.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,261 INFO L168 Benchmark]: Boogie Preprocessor took 124.59 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 79.3 MB in the beginning and 178.8 MB in the end (delta: -99.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,263 INFO L168 Benchmark]: RCFGBuilder took 203.85 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 167.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,264 INFO L168 Benchmark]: TraceAbstraction took 783.53 ms. Allocated memory is still 200.8 MB. Free memory was 167.0 MB in the beginning and 119.6 MB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:07,268 INFO L335 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 141.0 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.32 ms. Allocated memory is still 141.0 MB. Free memory was 88.6 MB in the beginning and 79.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.59 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 79.3 MB in the beginning and 178.8 MB in the end (delta: -99.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 203.85 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 167.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 783.53 ms. Allocated memory is still 200.8 MB. Free memory was 167.0 MB in the beginning and 119.6 MB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 26 SDtfs, 4 SDslu, 25 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 957 SizeOfPredicates, 6 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...