java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:05,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:05,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:05,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:05,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:05,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:05,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:05,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:05,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:05,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:05,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:05,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:05,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:05,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:05,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:05,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:05,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:05,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:26:05,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:26:05,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:26:05,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:26:05,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:26:05,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:26:05,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:26:05,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:26:05,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:26:05,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:26:05,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:26:05,219 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 13:26:05,235 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:05,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:05,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:05,235 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:05,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:05,236 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:05,237 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:05,237 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:05,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:05,237 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:05,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:05,238 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:05,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:05,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:05,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:05,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:05,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:05,239 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:05,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:05,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:05,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:05,240 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:05,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:05,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:05,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:05,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:05,241 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:05,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:05,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:05,242 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:05,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:05,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:05,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:05,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:05,292 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:05,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2019-09-20 13:26:05,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8862eb26/4eb0aa388b5649a0a815b2757c33663b/FLAG52389d240 [2019-09-20 13:26:05,813 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:05,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2019-09-20 13:26:05,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8862eb26/4eb0aa388b5649a0a815b2757c33663b/FLAG52389d240 [2019-09-20 13:26:06,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8862eb26/4eb0aa388b5649a0a815b2757c33663b [2019-09-20 13:26:06,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:06,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:06,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:06,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:06,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:06,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148b2de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06, skipping insertion in model container [2019-09-20 13:26:06,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,236 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:06,255 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:06,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:06,470 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:06,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:06,497 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:06,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06 WrapperNode [2019-09-20 13:26:06,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:06,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:06,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:06,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:06,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... [2019-09-20 13:26:06,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:06,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:06,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:06,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:06,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:06,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:06,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:06,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:06,906 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:06,907 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:26:06,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:06 BoogieIcfgContainer [2019-09-20 13:26:06,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:06,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:06,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:06,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:06,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:06" (1/3) ... [2019-09-20 13:26:06,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74189c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:06, skipping insertion in model container [2019-09-20 13:26:06,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:06" (2/3) ... [2019-09-20 13:26:06,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74189c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:06, skipping insertion in model container [2019-09-20 13:26:06,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:06" (3/3) ... [2019-09-20 13:26:06,916 INFO L109 eAbstractionObserver]: Analyzing ICFG mod3.c [2019-09-20 13:26:06,926 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:06,933 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:06,949 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:06,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:06,982 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:06,984 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:06,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:06,985 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:06,985 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:06,985 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:06,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-20 13:26:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:26:07,009 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:07,010 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:07,012 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash 271538127, now seen corresponding path program 1 times [2019-09-20 13:26:07,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:07,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:07,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:07,121 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 13:26:07,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:07,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:07,123 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:07,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:07,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:07,140 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-20 13:26:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:07,153 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-09-20 13:26:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:07,154 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-20 13:26:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:07,163 INFO L225 Difference]: With dead ends: 23 [2019-09-20 13:26:07,163 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 13:26:07,165 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 13:26:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 13:26:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 13:26:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:26:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-09-20 13:26:07,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-09-20 13:26:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:07,203 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-09-20 13:26:07,203 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-09-20 13:26:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:26:07,204 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:07,204 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:07,204 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash 183026044, now seen corresponding path program 1 times [2019-09-20 13:26:07,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:07,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:07,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:07,321 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 13:26:07,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:07,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:07,322 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:07,324 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:07,325 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-09-20 13:26:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:07,400 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2019-09-20 13:26:07,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:07,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-20 13:26:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:07,402 INFO L225 Difference]: With dead ends: 22 [2019-09-20 13:26:07,402 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 13:26:07,403 INFO L636 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 [2019-09-20 13:26:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 13:26:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-09-20 13:26:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-20 13:26:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-09-20 13:26:07,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-09-20 13:26:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:07,412 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-09-20 13:26:07,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-09-20 13:26:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:26:07,414 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:07,414 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:07,414 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1587594336, now seen corresponding path program 1 times [2019-09-20 13:26:07,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:07,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:07,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:07,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:07,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:07,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:07,701 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:07,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:07,702 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2019-09-20 13:26:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:09,845 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-20 13:26:09,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:09,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-20 13:26:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:09,847 INFO L225 Difference]: With dead ends: 27 [2019-09-20 13:26:09,847 INFO L226 Difference]: Without dead ends: 23 [2019-09-20 13:26:09,848 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:26:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-20 13:26:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-09-20 13:26:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-20 13:26:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-09-20 13:26:09,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2019-09-20 13:26:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:09,853 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-09-20 13:26:09,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-09-20 13:26:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:26:09,854 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:09,854 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:09,855 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash 816455220, now seen corresponding path program 1 times [2019-09-20 13:26:09,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:09,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:09,857 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:10,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:10,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:10,208 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:10,208 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:10,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:10,209 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-09-20 13:26:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:12,383 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-09-20 13:26:12,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:12,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-20 13:26:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:12,384 INFO L225 Difference]: With dead ends: 23 [2019-09-20 13:26:12,384 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:12,385 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:26:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:12,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-20 13:26:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:12,387 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:12,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:12,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:12,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:12 BoogieIcfgContainer [2019-09-20 13:26:12,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:12,395 INFO L168 Benchmark]: Toolchain (without parser) took 6180.59 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 89.2 MB in the beginning and 92.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,397 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.61 ms. Allocated memory is still 141.0 MB. Free memory was 89.0 MB in the beginning and 79.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,399 INFO L168 Benchmark]: Boogie Preprocessor took 136.39 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 79.5 MB in the beginning and 178.8 MB in the end (delta: -99.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,400 INFO L168 Benchmark]: RCFGBuilder took 273.77 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 166.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,401 INFO L168 Benchmark]: TraceAbstraction took 5483.22 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 92.1 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:12,405 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.61 ms. Allocated memory is still 141.0 MB. Free memory was 89.0 MB in the beginning and 79.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.39 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 79.5 MB in the beginning and 178.8 MB in the end (delta: -99.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.77 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 166.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5483.22 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 92.1 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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, 23 locations, 1 error locations. SAFE Result, 5.4s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 4.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 84 SDtfs, 11 SDslu, 104 SDs, 0 SdLazy, 49 SolverSat, 8 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 4656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...