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/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:17,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:17,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:17,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:17,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:17,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:17,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:17,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:17,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:17,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:17,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:17,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:17,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:17,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:17,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:17,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:17,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:17,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:17,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:17,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:17,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:17,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:17,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:17,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:17,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:25:17,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:25:17,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:25:17,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:25:17,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:25:17,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:25:17,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:17,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:17,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:17,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:17,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:17,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:17,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:17,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:17,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:17,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:17,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:17,895 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 [2019-09-20 13:25:17,910 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:17,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:17,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:17,911 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:17,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:17,912 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:17,912 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:17,913 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:17,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:17,913 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:17,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:17,914 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:17,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:17,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:17,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:17,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:17,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:17,915 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:17,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:17,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:17,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:17,916 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:17,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:17,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:17,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:17,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:17,917 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:17,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:17,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:17,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:17,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:17,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:17,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:17,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:17,965 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:17,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-09-20 13:25:18,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b03d45d/200286729b41413a8b4e4f941fffb123/FLAG29afc7e93 [2019-09-20 13:25:18,471 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:18,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-09-20 13:25:18,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b03d45d/200286729b41413a8b4e4f941fffb123/FLAG29afc7e93 [2019-09-20 13:25:18,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b03d45d/200286729b41413a8b4e4f941fffb123 [2019-09-20 13:25:18,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:18,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:18,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:18,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:18,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:18,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:18" (1/1) ... [2019-09-20 13:25:18,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cf23f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:18, skipping insertion in model container [2019-09-20 13:25:18,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:18" (1/1) ... [2019-09-20 13:25:18,897 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:18,915 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:19,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:19,086 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:19,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:19,110 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:19,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19 WrapperNode [2019-09-20 13:25:19,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:19,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:19,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:19,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:19,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (1/1) ... [2019-09-20 13:25:19,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:19,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:19,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:19,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:19,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (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 [2019-09-20 13:25:19,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-09-20 13:25:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-09-20 13:25:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:19,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:19,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:19,432 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:19,433 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:25:19,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:19 BoogieIcfgContainer [2019-09-20 13:25:19,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:19,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:19,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:19,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:19,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:18" (1/3) ... [2019-09-20 13:25:19,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de6285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:19, skipping insertion in model container [2019-09-20 13:25:19,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:19" (2/3) ... [2019-09-20 13:25:19,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de6285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:19, skipping insertion in model container [2019-09-20 13:25:19,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:19" (3/3) ... [2019-09-20 13:25:19,450 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-09-20 13:25:19,464 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:19,475 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:19,497 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:19,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:19,542 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:19,543 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:19,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:19,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:19,543 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:19,544 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:19,544 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-20 13:25:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:25:19,571 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:19,573 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:19,575 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2019-09-20 13:25:19,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:19,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:19,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:19,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:19,647 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:19,715 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:19,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:19,716 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:19,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:19,735 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-20 13:25:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:19,749 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-20 13:25:19,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:19,751 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 13:25:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:19,761 INFO L225 Difference]: With dead ends: 17 [2019-09-20 13:25:19,762 INFO L226 Difference]: Without dead ends: 17 [2019-09-20 13:25:19,764 INFO L636 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 [2019-09-20 13:25:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-20 13:25:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-20 13:25:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-20 13:25:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-20 13:25:19,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2019-09-20 13:25:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:19,805 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-20 13:25:19,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-20 13:25:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:25:19,806 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:19,806 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:19,807 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2019-09-20 13:25:19,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:19,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:19,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:19,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:19,809 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:19,884 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 13:25:19,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:19 BoogieIcfgContainer [2019-09-20 13:25:19,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:19,931 INFO L168 Benchmark]: Toolchain (without parser) took 1049.39 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 86.3 MB in the beginning and 144.4 MB in the end (delta: -58.1 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,933 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.58 ms. Allocated memory is still 139.5 MB. Free memory was 86.1 MB in the beginning and 76.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,938 INFO L168 Benchmark]: Boogie Preprocessor took 113.70 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 76.9 MB in the beginning and 177.1 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,939 INFO L168 Benchmark]: RCFGBuilder took 209.61 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 166.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,940 INFO L168 Benchmark]: TraceAbstraction took 490.70 ms. Allocated memory is still 199.2 MB. Free memory was 166.2 MB in the beginning and 144.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:19,956 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 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.58 ms. Allocated memory is still 139.5 MB. Free memory was 86.1 MB in the beginning and 76.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.70 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 76.9 MB in the beginning and 177.1 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 209.61 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 166.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 490.70 ms. Allocated memory is still 199.2 MB. Free memory was 166.2 MB in the beginning and 144.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [\old(x)=1, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...