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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:17,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:17,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:17,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:46:17,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:46:17,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:46:17,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:46:17,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:46:17,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:46:17,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:46:17,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:46:17,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:46:17,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:46:17,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:46:17,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:46:17,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:46:17,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:46:17,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:46:17,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:46:17,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:46:17,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:46:17,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:46:17,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:46:17,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:46:17,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:46:17,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:46:17,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:46:17,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:46:17,163 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 [2019-09-05 12:46:17,184 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:17,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:17,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:17,185 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:17,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:17,186 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:17,186 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:17,187 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:17,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:17,187 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:17,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:17,189 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:17,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:17,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:17,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:17,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:17,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:17,191 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:17,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:17,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:17,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:17,192 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:17,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:17,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:17,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:17,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:17,193 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:17,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:17,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:17,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:17,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:17,239 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:17,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:17,243 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:17,244 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:17,245 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2019-09-05 12:46:17,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cb9d579/d707a57544d443c1a1327ba4308ae162/FLAG21076bcb8 [2019-09-05 12:46:17,774 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:17,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2019-09-05 12:46:17,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cb9d579/d707a57544d443c1a1327ba4308ae162/FLAG21076bcb8 [2019-09-05 12:46:18,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cb9d579/d707a57544d443c1a1327ba4308ae162 [2019-09-05 12:46:18,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:18,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:18,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:18,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:18,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:18,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163020e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18, skipping insertion in model container [2019-09-05 12:46:18,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,152 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:18,168 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:18,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:18,373 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:18,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:18,509 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:18,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18 WrapperNode [2019-09-05 12:46:18,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:18,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:18,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:18,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:18,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (1/1) ... [2019-09-05 12:46:18,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:18,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:18,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:18,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:18,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (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 [2019-09-05 12:46:18,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:18,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:18,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:18,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-05 12:46:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 12:46:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 12:46:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 12:46:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:18,983 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:18,983 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-05 12:46:18,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:18 BoogieIcfgContainer [2019-09-05 12:46:18,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:18,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:18,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:18,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:18,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:18" (1/3) ... [2019-09-05 12:46:18,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629e5c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:18, skipping insertion in model container [2019-09-05 12:46:18,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:18" (2/3) ... [2019-09-05 12:46:18,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629e5c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:18, skipping insertion in model container [2019-09-05 12:46:18,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:18" (3/3) ... [2019-09-05 12:46:18,991 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2019-09-05 12:46:19,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:19,006 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:19,022 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:19,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:19,049 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:19,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:19,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:19,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:19,050 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:19,050 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:19,050 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-09-05 12:46:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:46:19,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:19,073 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:19,075 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 907546272, now seen corresponding path program 1 times [2019-09-05 12:46:19,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:19,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:19,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:19,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:19,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:46:19,238 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:19,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:19,257 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-09-05 12:46:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:19,275 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-05 12:46:19,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:19,277 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-05 12:46:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:19,286 INFO L225 Difference]: With dead ends: 36 [2019-09-05 12:46:19,286 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 12:46:19,288 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 [2019-09-05 12:46:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 12:46:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-05 12:46:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 12:46:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-09-05 12:46:19,339 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-09-05 12:46:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:19,340 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-09-05 12:46:19,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-09-05 12:46:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:46:19,342 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:19,343 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:19,344 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1455815888, now seen corresponding path program 1 times [2019-09-05 12:46:19,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:19,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:19,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,348 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:19,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:19,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:46:19,462 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:19,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:46:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:46:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:46:19,467 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-09-05 12:46:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:19,544 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2019-09-05 12:46:19,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:46:19,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-05 12:46:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:19,548 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:46:19,548 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:46:19,549 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 [2019-09-05 12:46:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:46:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2019-09-05 12:46:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:46:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-05 12:46:19,556 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-09-05 12:46:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:19,557 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-05 12:46:19,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:46:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-05 12:46:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 12:46:19,558 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:19,558 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] [2019-09-05 12:46:19,559 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -941161554, now seen corresponding path program 1 times [2019-09-05 12:46:19,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:19,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:19,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:19,561 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:19,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:19,679 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:19,681 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-05 12:46:19,683 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [24], [27], [33], [39], [64], [69], [72], [100], [103], [105], [111], [112], [113], [115] [2019-09-05 12:46:19,727 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:19,728 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:19,815 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-05 12:46:19,817 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 26 variables. [2019-09-05 12:46:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:19,820 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-05 12:46:19,854 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-05 12:46:19,855 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-05 12:46:19,857 INFO L420 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2019-09-05 12:46:19,857 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-05 12:46:19,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:46:19,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-05 12:46:19,858 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:19,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:19,859 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 2 states. [2019-09-05 12:46:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:19,860 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-05 12:46:19,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:19,860 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-05 12:46:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:19,861 INFO L225 Difference]: With dead ends: 6 [2019-09-05 12:46:19,861 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:46:19,861 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:46:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:46:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:46:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:46:19,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-09-05 12:46:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:19,863 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:46:19,863 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:46:19,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:46:19,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:19 BoogieIcfgContainer [2019-09-05 12:46:19,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:19,871 INFO L168 Benchmark]: Toolchain (without parser) took 1733.54 ms. Allocated memory was 133.2 MB in the beginning and 199.8 MB in the end (delta: 66.6 MB). Free memory was 87.9 MB in the beginning and 109.4 MB in the end (delta: -21.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,872 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.91 ms. Allocated memory was 133.2 MB in the beginning and 199.8 MB in the end (delta: 66.6 MB). Free memory was 87.7 MB in the beginning and 176.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,874 INFO L168 Benchmark]: Boogie Preprocessor took 59.25 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 174.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,875 INFO L168 Benchmark]: RCFGBuilder took 413.87 ms. Allocated memory is still 199.8 MB. Free memory was 174.0 MB in the beginning and 156.1 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,876 INFO L168 Benchmark]: TraceAbstraction took 883.42 ms. Allocated memory is still 199.8 MB. Free memory was 156.1 MB in the beginning and 109.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:19,880 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 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.91 ms. Allocated memory was 133.2 MB in the beginning and 199.8 MB in the end (delta: 66.6 MB). Free memory was 87.7 MB in the beginning and 176.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.25 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 174.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.87 ms. Allocated memory is still 199.8 MB. Free memory was 174.0 MB in the beginning and 156.1 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 883.42 ms. Allocated memory is still 199.8 MB. Free memory was 156.1 MB in the beginning and 109.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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, 36 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 75 SDtfs, 16 SDslu, 23 SDs, 0 SdLazy, 19 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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, 0.8875 AbsIntWeakeningRatio, 1.05 AbsIntAvgWeakeningVarsNumRemoved, 0.3 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...