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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:36:55,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:36:55,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:36:55,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:36:55,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:36:55,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:36:55,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:36:55,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:36:55,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:36:55,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:36:55,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:36:55,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:36:55,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:36:55,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:36:55,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:36:55,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:36:55,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:36:55,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:36:55,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:36:55,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:36:55,870 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 20:36:55,896 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:36:55,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:36:55,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:36:55,897 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:36:55,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:36:55,898 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:36:55,898 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:36:55,899 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:36:55,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:36:55,899 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:36:55,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:36:55,902 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:36:55,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:36:55,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:36:55,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:36:55,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:36:55,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:36:55,903 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:36:55,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:36:55,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:36:55,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:36:55,905 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:36:55,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:36:55,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:36:55,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:36:55,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:36:55,906 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:36:55,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:36:55,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:36:55,906 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:36:55,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:36:55,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:36:55,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:36:55,986 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:36:55,986 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:36:55,988 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2019-09-03 20:36:56,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f187c9a/6d9aa78b07144020bba0d319be3fff68/FLAG17d3bb494 [2019-09-03 20:36:56,506 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:36:56,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2019-09-03 20:36:56,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f187c9a/6d9aa78b07144020bba0d319be3fff68/FLAG17d3bb494 [2019-09-03 20:36:56,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f187c9a/6d9aa78b07144020bba0d319be3fff68 [2019-09-03 20:36:56,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:36:56,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:36:56,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:36:56,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:36:56,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:36:56,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:36:56" (1/1) ... [2019-09-03 20:36:56,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fabe5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:56, skipping insertion in model container [2019-09-03 20:36:56,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:36:56" (1/1) ... [2019-09-03 20:36:56,919 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:36:56,938 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:36:57,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:36:57,186 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:36:57,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:36:57,228 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:36:57,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57 WrapperNode [2019-09-03 20:36:57,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:36:57,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:36:57,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:36:57,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:36:57,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (1/1) ... [2019-09-03 20:36:57,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:36:57,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:36:57,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:36:57,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:36:57,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (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 20:36:57,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:36:57,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:36:57,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:36:57,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:36:57,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:36:57,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:36:57,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:36:57,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 20:36:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:36:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:36:57,796 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:36:57,796 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-03 20:36:57,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:36:57 BoogieIcfgContainer [2019-09-03 20:36:57,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:36:57,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:36:57,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:36:57,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:36:57,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:36:56" (1/3) ... [2019-09-03 20:36:57,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c912f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:36:57, skipping insertion in model container [2019-09-03 20:36:57,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:36:57" (2/3) ... [2019-09-03 20:36:57,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c912f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:36:57, skipping insertion in model container [2019-09-03 20:36:57,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:36:57" (3/3) ... [2019-09-03 20:36:57,806 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2019-09-03 20:36:57,817 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:36:57,823 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:36:57,840 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:36:57,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:36:57,865 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:36:57,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:36:57,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:36:57,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:36:57,866 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:36:57,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:36:57,867 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:36:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-03 20:36:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:36:57,890 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:57,891 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:57,893 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1823924036, now seen corresponding path program 1 times [2019-09-03 20:36:57,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:57,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:57,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:57,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:57,942 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:58,052 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 20:36:58,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:36:58,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:36:58,054 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:36:58,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:36:58,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:36:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:36:58,073 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-03 20:36:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:58,089 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-09-03 20:36:58,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:36:58,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-03 20:36:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:58,099 INFO L225 Difference]: With dead ends: 32 [2019-09-03 20:36:58,100 INFO L226 Difference]: Without dead ends: 27 [2019-09-03 20:36:58,102 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:36:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-03 20:36:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-03 20:36:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:36:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-03 20:36:58,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-09-03 20:36:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:58,143 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-03 20:36:58,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:36:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-03 20:36:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:36:58,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:58,144 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:58,145 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1169658974, now seen corresponding path program 1 times [2019-09-03 20:36:58,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:58,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:58,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:58,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:58,147 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:58,351 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 20:36:58,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:36:58,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-03 20:36:58,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:36:58,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:36:58,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:36:58,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-03 20:36:58,354 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2019-09-03 20:36:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:36:58,515 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-09-03 20:36:58,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:36:58,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-09-03 20:36:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:36:58,518 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:36:58,519 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 20:36:58,520 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:36:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 20:36:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-09-03 20:36:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:36:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-03 20:36:58,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2019-09-03 20:36:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:36:58,531 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-03 20:36:58,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:36:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-03 20:36:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:36:58,532 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:36:58,532 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:36:58,533 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:36:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:36:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1835570138, now seen corresponding path program 1 times [2019-09-03 20:36:58,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:36:58,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:58,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:36:58,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:36:58,535 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:36:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:36:59,635 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 33 [2019-09-03 20:36:59,918 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 37 [2019-09-03 20:37:00,210 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2019-09-03 20:37:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:00,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:37:00,270 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:37:00,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2019-09-03 20:37:00,274 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [17], [19], [23], [29], [31], [35], [37], [41], [47], [49], [51], [55], [63], [73], [76], [78], [84], [85], [86], [88] [2019-09-03 20:37:00,334 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:37:00,334 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:37:00,388 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-03 20:37:00,390 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 16 root evaluator evaluations with a maximum evaluation depth of 0. Performed 16 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 33 variables. [2019-09-03 20:37:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:00,394 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-03 20:37:00,429 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-03 20:37:00,429 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-03 20:37:00,431 INFO L420 sIntCurrentIteration]: We unified 24 AI predicates to 24 [2019-09-03 20:37:00,432 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-03 20:37:00,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:37:00,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 13 [2019-09-03 20:37:00,433 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:00,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:37:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:37:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:37:00,434 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 2 states. [2019-09-03 20:37:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:00,435 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-03 20:37:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:37:00,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2019-09-03 20:37:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:00,436 INFO L225 Difference]: With dead ends: 6 [2019-09-03 20:37:00,436 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:37:00,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:37:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:37:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:37:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:37:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:37:00,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-09-03 20:37:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:00,438 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:37:00,438 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:37:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:37:00,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:37:00,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:37:00 BoogieIcfgContainer [2019-09-03 20:37:00,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:37:00,446 INFO L168 Benchmark]: Toolchain (without parser) took 3543.84 ms. Allocated memory was 138.9 MB in the beginning and 221.8 MB in the end (delta: 82.8 MB). Free memory was 87.0 MB in the beginning and 88.3 MB in the end (delta: -1.3 MB). Peak memory consumption was 81.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,447 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.72 ms. Allocated memory is still 138.9 MB. Free memory was 86.8 MB in the beginning and 76.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,449 INFO L168 Benchmark]: Boogie Preprocessor took 155.34 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.5 MB in the beginning and 176.1 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,450 INFO L168 Benchmark]: RCFGBuilder took 412.55 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 158.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,451 INFO L168 Benchmark]: TraceAbstraction took 2644.80 ms. Allocated memory was 199.2 MB in the beginning and 221.8 MB in the end (delta: 22.5 MB). Free memory was 158.0 MB in the beginning and 88.3 MB in the end (delta: 69.7 MB). Peak memory consumption was 92.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:00,456 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.72 ms. Allocated memory is still 138.9 MB. Free memory was 86.8 MB in the beginning and 76.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.34 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.5 MB in the beginning and 176.1 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 412.55 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 158.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2644.80 ms. Allocated memory was 199.2 MB in the beginning and 221.8 MB in the end (delta: 22.5 MB). Free memory was 158.0 MB in the beginning and 88.3 MB in the end (delta: 69.7 MB). Peak memory consumption was 92.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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 4 procedures, 32 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 62 SDtfs, 12 SDslu, 34 SDs, 0 SdLazy, 34 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 1 AbstIntStrong, 0.9166666666666666 AbsIntWeakeningRatio, 1.0416666666666667 AbsIntAvgWeakeningVarsNumRemoved, 0.25 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 13216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...